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    Wyświetlanie 1-65 z 65
    Tytuł:
    Materials Used in the Automotive Industry
    Autorzy:
    Orłowicz, A. W.
    Mróz, M.
    Tupaj, M.
    Trytek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383174.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automotive industry
    foundry material
    casting technique
    przemysł motoryzacyjny
    materiał odlewniczy
    technika odlewnicza
    Opis:
    Elaborated shapes of many car components are the reason for which the use of casting techniques to fabricate them is a solution wellfounded from the economical point of view. Currently applicable regulatory requirements concerning emissions of exhaust fumes force the carmakers to reduce the overall weight of their products, as this is a basic precondition for reducing fuel consumption. As a result, newly launched car models contain a continuously increasing share of thin-walled castings made of materials which ensure a satisfactory level of service properties. At the same time, developing new technological processes allowing to extend the service life of individual components by means of surface improving becomes more and more important.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 75-78
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examination of Electrical Resistance of Carburizers Used for Cast Iron Production
    Autorzy:
    Książek, D.
    Koza, M.
    Bieroński, M.
    Krasa, O.
    Kuś, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/381730.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast iron
    foundry material
    carburizer
    electrical resistance
    żeliwo
    materiał odlewniczy
    nawęglacz
    opór elektryczny
    Opis:
    The publication presents the results of examination of selected carburizers used for cast iron production with respect to their electric resistance. Both the synthetic graphite carburizers and petroleum coke (petcoke) carburizers of various chemical composition were compared. The relationships between electrical resistance of tested carburizers and their quality were found. The graphite carburizers exhibited much better conductivity than the petcoke ones. Resistance characteristics were different for the different types of carburizers. The measurements were performed according to the authors’ own method based on recording the electric current flow through the compressed samples. The samples of the specified diameter were put under pressure of the gradually increased value (10, 20, 50, 60, and finally 70 bar), each time the corresponding value of electric resistance being measured with a gauge of high accuracy, equal to 0.1μΩ. The higher pressure values resulted in the lower values of resistance. The relation between both the thermal conductance and the electrical conductance (or the resistance) is well known and mentioned in the professional literature. The results were analysed and presented both in tabular and, additionally, in graphic form.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 65-68
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of time and pressure of forming a pattern on mechanical properties
    Autorzy:
    Pacyniak, T.
    Buczkowska, K.
    Kaczorowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/382163.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    foundry engineering
    lost foam
    polystyrene pattern
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    przemysł odlewniczy
    tracona piana
    styropianowy model odlewniczy
    Opis:
    In this paper, the technology of forming patterns on a research station equipped with an autoclave A-600 of Polish company GROM is presented. This study was conducted to determine the influence of pressure and time of forming a pattern on the bending strength. Analysis of the results confirmed that bending strength increases with increasing the pressure. The time of forming a pattern has a similar effect.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 151-156
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cast construction elements for heat treatment furnaces
    Autorzy:
    Piekarski, B.
    Drotlew, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382333.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    heat treatment plant
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    zakład obróbki cieplnej
    Opis:
    The study presents sketches and photos of the cast creep-resistant components used in various types of heat treatment furnaces. The shape of the elements results from the type of the operation carried out in the furnace, while dimensions are adjusted to the size of the furnace working chamber. The castings are mainly made from the high-alloyed, austenitic chromium-nickel or nickel-chromium steel, selecting the grade in accordance with the furnace operating conditions described by the rated temperature, the type and parameters of the applied operating atmosphere, and the charge weight. Typical examples in this family of construction elements are: crucibles, roller tracks, radiant tubes and guides. The majority of castings are produced in sand moulds.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 163-170
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Selected Properties of Green Sands with Modified Starch-based Additives
    Autorzy:
    Kaczmarska, K.
    Grabowska, B.
    Drożyński, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382341.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative moulding material
    green sand system
    moulding sand
    carboxymethyl starch sodium
    innowacyjny materiał odlewniczy
    masa formierska
    skrobia karboksymetylowana
    Opis:
    The aim of this study was the preliminary assessment the effectiveness of application of sodium carboxymethyl starch (CMS-Na) as an additives to green sands with bentonite. Two modified starches CMS-Na having a low and a high degree of substitution (DS), 0.2 and 0.9 respectively, were chosen for preparing moulding sands. Influence of modified starch with different DS on the properties of the green sand was determined based on the results of the determination: apparent density, permeability, free flowability, friability and compressive strength, tensile and shear green sands with the addition of starch. The properties of the starch without starch-based additives were compared with the properties of green sand containing in the composition of CMS-Na with different degree of substitution.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 127-131
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Aging Time Effects of the Pre-expanded Polystyrene on the Patterns Mechanical Properties
    Autorzy:
    Buczkowska, K.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381049.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting technology
    Innovative casting material
    foundry
    lost foam
    model of polystyrene
    casting
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    tracona piana
    polistyrenowy model odlewniczy
    Opis:
    The aging granulate is to activate the blowing agent during the manufacturing process to granulate models can re-expand and shape the model of well-sintered granules, smooth surface and a suitable mechanical strength. The article presents the results of studies which aim was to determine the optimum time for aging pre-foamed granules for pre-selected raw materials. The testing samples were shaped in an autoclave, with constant parameters sintering time and temperature. Samples were made at 30 minute intervals. Models have been subjected to flexural strength and hardness.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 131-137
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of Foundry Binders by Biodegradable Material
    Autorzy:
    Major-Gabryś, K.
    Grabarczyk, A.
    Dobosz, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380402.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environmental protection
    innovative foundry material
    phenol-furfuryl resin
    hydrated sodium silicate
    biodegradable material
    ochrona środowiska
    innowacyjny materiał odlewniczy
    uwodniony krzemian sodu
    materiał biodegradowalny
    Opis:
    The paper presents the impact of biodegradable material - polycaprolactone (PCL) on selected properties of moulding sands. A self-hardening moulding sands with phenol-furfuryl resin, which is widely used in foundry practice, and an environmentally friendly self-hardening moulding sand with hydrated sodium silicate where chosen for testing. The purpose of the new additive in the case of synthetic resin moulding sands is to reduce their harmfulness to the environment and to increase their “elasticity” at ambient temperature. In the case of moulding sands with environmentally friendly hydrated sodium silicate binder, the task of the new additive is to increase the elasticity of the tested samples while preserving their ecological character. Studies have shown that the use of 5% PCL in moulding sand increases their flexibility at ambient temperature, both with organic and inorganic binders. The influence of the new additive on the deformation of the moulding sands at elevated temperatures has also been demonstrated.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 31-34
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Flexibility of Pusher Furnace Grate
    Autorzy:
    Słowik, J. A.
    Drotlew, A.
    Piekarski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/383197.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    heat treatment plant
    pusher furnace
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    obróbka cieplna
    piec przepychowy
    Opis:
    The lifetime of guide grates in pusher furnaces for heat treatment could be increased by raising the flexibility of their structure through, for example, the replacement of straight ribs, parallel to the direction of grate movement, with more flexible segments. The deformability of grates with flexible segments arranged in two orientations, i.e. crosswise (perpendicular to the direction of compression) and lengthwise (parallel to the direction of compression), was examined. The compression process was simulated using SolidWorks Simulation program. Relevant regression equations were also derived describing the dependence of force inducing the grate deformation by 0.25 mm ‒ modulus of grate elasticity ‒ on the number of flexible segments in established orientations. These calculations were made in Statistica and Scilab programs. It has been demonstrated that, with the same number of segments, the crosswise orientation of flexible segments increases the grate structure flexibility in a more efficient way than the lengthwise orientation. It has also been proved that a crucial effect on the grate flexibility has only the quantity and orientation of segments (crosswise / lengthwise), while the exact position of segments changes the grate flexibility by less than 1%.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 137-140
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena możliwości wykorzystania w odlewnictwie gipsu syntetycznego uzyskanego podczas procesu mokrego odsiarczania spalin w energetyce
    Evaluation of synthetic gypsum recovered via wet flue-gas desulfurization from electric power plants for use in foundries
    Autorzy:
    Biernacki, R.
    Haratym, R.
    Krzyńska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382362.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    odsiarczanie spalin
    gips syntetyczny
    forma gipsowa
    forma ceramiczna
    innovative foundry material
    desulfurization
    synthetic gypsum
    gypsum mould
    ceramic mould
    Opis:
    Przedstawiono analizę możliwości wykorzystania w odlewnictwie gipsu odpadowego (syntetycznego) uzyskiwanego w procesie odsiarczania spalin w energetyce. Energetyka jest jednym z największych producentem SO2. W celu ochrony środowiska i obniżenia ilości zanieczyszczeń stosuje się odsiarczanie spalin metodą mokrą. W wyniku tego procesu powstaje gips odpadowy, który może być stosowany w praktyce. Przeprowadzono badania, w wyniku których określono sposoby przygotowania tego gipsu do wykonywania form odlewniczych. W artykule oceniono skład chemiczny, wytrzymałość i przepuszczalność form z uzyskanego gipsu syntetycznego, porównano je z właściwościami gipsu odlewniczego GoldStar XL oraz właściwościami form ceramicznych. Zbadano strukturę gipsów, wykonano badania na derywatografie oraz określono energochłonność procesu wytwarzania gipsu odpadowego w instalacji mokrego odsiarczania. Po analizie zebranych danych można stwierdzić, że gips syntetyczny może być używany jako materiał na formy odlewnicze. Nie obserwuje się znaczącego spadku najważniejszych właściwości, a z drugiej strony istnieje wiele dodatkowych korzyści, w tym niskie zużycie energii, obniżenie kosztów i zmniejszenie wpływu na środowisko.
    This article investigates possible use of waste gypsum (synthetic), recovered via flue-gas desulfurization from coal-fired electric power plants, in foundries. Energy sector, which in Eastern Europe is mostly composed from coal-fired electric power plants, is one of the largest producers of sulfur dioxide (SO2). In order to protect the environment and reduce the amount of pollution flue-gas desulfurization (FGD) is used to remove SO2 from exhaust flue gases of fossil-fuel power plants. As a result of this process gypsum waste is produced that can be used in practical applications. Strength and permeability tests have been made and also in-depth analysis of energy consumption of production process to investigate ways of preparing the synthetic gypsum for casting moulds application. This paper also assesses the chemical composition, strength and permeability of moulds made with synthetic gypsum, in comparison with moulds made with traditional GoldStar XL gypsum and with ceramic molds. Moreover examination of structure of synthetic gypsum, the investigations on derivatograph and calculations of energy consumption during production process of synthetic gypsum in wet flue-gas desulfurization were made.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Application for Infrared Camera in Analyzing of the Solidification Process of Al-Si Alloy
    Autorzy:
    Władysiak, R.
    Kozuń, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381103.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    thermography
    TDA method
    silumin
    microstructure
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    termografia
    metoda ATD
    mikrostruktura
    Opis:
    The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler TDA-10, that was cooling down in ambient air. The study was conducted for silumin AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of neareutectic silumin.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 81-84
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of two-stage isothermal annealing on microstructure CuAl10Fe5Ni5 bronze with additions of Si, Cr, Mo, W and C
    Autorzy:
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380284.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    technological properties
    bronze alloy
    TTT curve
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    właściwości technologiczne
    stop brązu
    Opis:
    The aim of this study was to investigate the effect of a two-step isothermal annealing respectively at 1000 ˚C for 30 min, then at the range of 900÷450 ˚C increments 50 ˚C on the microstructure CuAl10 Ni5Fe5 bronze with additions of Si, Cr, Mo, W and C, cast into sand moulds. The study concerned the newly developed species, bronze, aluminium-iron-nickel with additions of Si, Cr, Mo, W and C. In order to determine the time and temperature for the characteristic of phase transitions that occur during heat treatment of the test method was used thermal and derivation analysis (TDA). The study was conducted on cylindrical test castings cast in the mould of moulding sand. It was affirmed that one the method TDA can appoint characteristic for phase transformations points about co-ordinates: τ (s), t (˚C), and to plot out curves TTT for the studied bronze with their use. It was also found that there is a five isothermal annealing temperature ranges significantly altering the microstructure of examined bronze.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 187-194
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigations on the Ejector Forces in the Die Casting Process
    Autorzy:
    Krischke, S.
    Müller, S.
    Schuchardt, T.
    Kouki, Y.
    Dilger, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382411.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    information technology
    foundry industry
    high pressure die casting
    ejector force
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    technologia informatyczna
    przemysł odlewniczy
    odlewanie wysokociśnieniowe
    Opis:
    A measuring system was developed for the measurement of ejector forces in the die casting process. When selecting the sensor technology, particular care was taken to ensure that measurements can be taken with a high sampling rate so that the fast-running ejection process can be recorded. For this reason, the system uses piezoelectric force sensors which measure the forces directly at the individual ejector pins. In this way, depending on the number of sensors, it is possible to determine both the individual ejector forces and the total ejector force. The system is expandable and adaptable with regard to the number and position of the sensors and can also be applied to real HPDC components. Automatic triggering of the measurements is also possible. In addition to the measuring system, a device and a method for in-situ calibration of the sensors have also been developed. To test the measuring system, casting experiments were carried out with a real aluminium HPDC aluminium component. The experiments showed that it is possible to measure the ejector forces with sufficient sampling rate and also to observe the process steps of filling, intensification and die opening by means of ejector forces. Experimental setup serves as a basis for future investigations regarding the influencing parameters on the ejection process.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 116-119
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania nad odnawialnością polimerowych spoiw odlewniczych
    Studies on the renewability of polymeric binders for foundry
    Autorzy:
    Grabowska, B.
    Kaczmarska, K.
    Bobrowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383131.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    masa formierska
    spoiwo polimerowe
    sieciowanie spoiwa
    innovative foundry material
    innovative foundry technology
    moulding sand
    polymer binder
    Opis:
    W niniejszej pracy przedstawiono wycinek badań nowych polimerowych spoiw odlewniczych na przykładzie spoiwa BioCo2 z uwzględnieniem problemu jego odnawialności. Omówiono wyniki badań strukturalnych (FT-IR) dla spoiwa BioCo2 przed i po usieciowaniu oraz badań wytrzymałości na zginanie [...] utwardzonej masy formierskiej świeżej, jak i odnowionej wiązanej spoiwem BioCo2. Sieciowanie spoiwa, jak też utwardzanie masy przeprowadzono na drodze fizycznej (promieniowanie mikrofalowe, temperatura). Na podstawie otrzymanych wyników badań wykazano, że istnieje możliwość przywrócenia pierwotnych właściwości wiążących spoiwa BioCo2. Po usieciowaniu spoiwa, jak też po jego utwardzeniu w masie formierskiej właściwości pierwotne można uzyskać poprzez uzupełnienie składu masy o odpowiednią wyznaczoną stechiometrycznie ilość wody. Stwierdzono, że po procesie odnowienia spoiwo BioCo2 nie traci swojej mocy wiązania.
    In this paper the results of studies of polymeric binders on the example of the new BioCo2 binder, including the problem of its renewability, are presented. The results of structural studies (FT-IR) for the BioCo2 binder before and after crosslinking, and bending strength tests […] fresh and renewed cured molding sands with BioCo2 binder are discussed. The cross-linking binder and curring of moulding sand was carried out by physical agents (microwave radiation, temperature). On the basis of obtained results was shown that it is possible to restore the initial properties of the adhesive of BioCo2 binder. The initial properties of moulding sand can be achieved, after the cross-linking binders and after curing in the moulding sands with bioCo2 binder , by supplementing the moulding sand composition by the appropriate amount of water.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 47-52
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Materials in the Production of Moulding and Core Sands
    Autorzy:
    Dobosz, S. M.
    Major-Gabryś, K.
    Grabarczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383336.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    innovative foundry technology
    innovative foundry material
    moulding sand
    binder
    biodegradable material
    ochrona środowiska
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    masa formierskia
    spoiwo
    materiał biodegradowalny
    Opis:
    The article shows the influence of environment requirements on changes in different foundry moulding sands technologies such as cold box, self-hardening moulding sands and green sands. The aim of the article is to show the possibility of using the biodegradable materials as binders (or parts of binders’ compositions) for foundry moulding and core sands. The authors concentrated on the possibility of preparing new binders consisting of typical synthetic resins - commonly used in foundry practice - and biodegradable materials. According to own research it is presumed that using biodegradable materials as a part of new binders’ compositions may cause not only lower toxicity and better ability to reclaim, but may also accelerate the biodegradation rate of used binders. What’s more, using some kinds of biodegradable materials may improve flexibility of moulding sands with polymeric binder. The conducted research was introductory and took into account bending strength and thermal properties of furan moulding sands with biodegradable material (PCL). The research proved that new biodegradable additive did not decrease the tested properties.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 25-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ charakteru chemicznego osnowy i spoiwa na właściwości mas ze spoiwami organicznymi
    Influence of the chemical character of a sand grains and binder on properties of moulding sands with organic binding agents
    Autorzy:
    Holtzer, M.
    Drożyński, D.
    Bobrowski, A.
    Mazur, M.
    Isendorf, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/382955.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    masa sypka
    masa samoutwardzalna
    żywica furfurylowa
    innovative foundry material
    innovative foundry technology
    self hardening sand
    furan resin
    Opis:
    W artykule zamieszczono wyniki badań wpływu rodzaju osnowy piaskowej (piasek kwarcowy, chromitowy i oliwinowy) na właściwości mas (wytrzymałość [...], ścieralność S, przepuszczalność Pu oraz żywotność Ż) przy zastosowaniu spoiw organicznych o charakterze kwaśnym i zasadowym. Najkorzystniejsze właściwości miały masy, w których osnowa i spoiwo miały najbardziej zbliżony charakter chemiczny (piasek kwarcowy i żywica furanowa). Natomiast w miarę wzrostu różnicy charakteru chemicznego osnowy i żywicy właściwości mas znacznie pogarszały się i w skrajnym przypadku, jakim był układ piasek oliwinowi – żywica furanowa masa nie uzyskiwała nawet minimalnych wymaganych parametrów.
    The results of investigations of the kind of the sand grains (high-silica, chromite and olivine sand) on moulding sands properties when organic binding agents of an acidic and basic character were applied, are given in the paper. Moulding sands, in which a sand grains and binding agent were of a similar chemical character (high-silica sand and furan resin), exhibited the best qualities. As the difference of the chemical character of the sand grains and binder was increasing the properties of moulding sands significantly worsened. In the extreme case, which constituted the system: olivine sand and furan resin the moulding sand did not reach even the minimum of the required parameters values.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 69-74
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and properties of new ecological copper alloys for fittings
    Autorzy:
    Juszczyk, B.
    Kulasa, J.
    Cwolek, B.
    Malec, W.
    Wierzbicki, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/380157.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    ecological brass
    thermal derivative analysis
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    mosiądz ekologiczny
    analiza termiczna
    analiza derywacyjna
    Opis:
    The article presents the results of studies concerning the selection of the chemical composition of the new ecological copper alloys for fittings. It was analyzed, among other things, the impact of the content of bismuth, aluminum, iron and boron. Their solidification process was characterized on the grounds of thermal and derivative analysis (TDA). Also the microstructure and mechanical properties were analyzed. Casting properties were determined by the castability spiral test. It was found that zinc is an essential component of the tested group of alloys, determining the course of their crystallization, phase composition and microstructure. There was no significant effect from the other elements on the course of crystallization. The obtained results revealed that bismuth is the element of the strongest impact on the castability changes. The formulated alloys surpass the commonly used standardized alloy intended for components of fittings, namely MO59, in terms of casting and mechanical (hardness) properties.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 97-102
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Roughness of surface of vacuum castings prepared in plaster moulds
    Autorzy:
    Pawlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382696.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modern casting material
    modern casting technology
    precision casting
    plaster mould
    surface roughness
    nowoczesny materiał odlewniczy
    nowoczesna technologia odlewnicza
    odlewanie precyzyjne
    forma gipsowa
    chropowatość powierzchni
    Opis:
    The results of researches on surface roughness of CuSn10 and CuSn5Zn5Pb5 bronzes and aluminum AlSi11 alloy vacuum castings prepared in plaster moulds are presented in this paper. Test samples were cut from stripe castings of dimensions 100x15x1 mm. Surfaces were carefully cleaned with use of soft brush than in ultrasonic washer and dried. Experimental castings were prepared in moulds made of two types of plaster. Cast temperatures were 1120 and 1200°C for bronzes and 700 and 800°C for silumin. Temperatures of the mould were 500 and 600°C for bronzes and 200 and 300°C for aluminum alloy. The roughness measurements were carried out with use of Hommelwerke Tester T1000. The average arithmetic deviation of roughness profile Ra, the ten-point height of irregularities Rz and maximum peak to valley height Rm, were measured. It can be stated, on the base of obtained results, that technology of casting in plaster moulds allows preparation of castings of very low roughness, average Ra=0,88÷1,74μm for bronzes and Ra=0,59÷0,83μm for aluminum alloys. Roughness of the surface depends in fact on the cast material. Type of plaster and casting parameters have negligible influence on it.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 157-162
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Thermal Properties of Cast Metal-Ceramic Composite Foams
    Autorzy:
    Gawdzińska, K.
    Chybowski, L.
    Przetakiewicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/382873.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting material
    foundry technology
    metal composite foam
    ceramic composite foam
    thermal properties
    materiał odlewniczy
    technologia odlewnicza
    piana metalowa
    piana ceramiczna
    piana kompozytowa
    właściwości termiczne
    Opis:
    Owing to its properties, metallic foams can be used as insulation material. Thermal properties of cast metal-ceramic composite foams have applications in transport vehicles and can act as fire resistant and acoustic insulators of bulkheads. This paper presents basic thermal properties of cast and foamed aluminum, the values of thermal conductivity coefficient of selected gases used in foaming composites and thermal capabilities of composite foams (AlSi11/SiC). A certificate of non-combustibility test of cast aluminum-ceramic foam for marine applications was included inside the paper. The composite foam was prepared by the gas injection method, consisting in direct injection of gas into liquid metal. Foams with closed and open cells were examined. The foams were foaming with foaming gas consisting of nitrogen or air. This work is one of elements of researches connected with description of properties of composite foams. In author's other works acoustic properties of these materials will be presented.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 47-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ geometrii powierzchni zewnętrznych modeli woskowych na kinetykę wysychania form ceramicznych
    Influence of the External Surface of Wax Pattern on the Kinetics of Drying of Ceramic Molds
    Autorzy:
    Zych, J.
    Kolczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380634.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    szybkość wysychania
    spoiwo koloidalne
    kształt modelu
    czynniki technologiczne
    innovative foundry material
    innovative foundry technology
    colloidal binder
    technological factors
    Opis:
    W przedstawionej pracy, stosując metodę grawimetryczną wyznaczono przebieg wysychania poszczególnych warstw ciekłej mieszanki ceramicznej (CMC), naniesionej na modele woskowe w technologii wytapianych modeli, tworzących tym samym wielowarstwową formę ceramiczną. Stwierdzono, że każda kolejno naniesiona warstwa o podobnej grubości wysycha dłużej, od poprzedniej. Czas wysychania warstw tworzących zamknięte przestrzenie wydłuża się wielokrotnie w porównaniu z wysychaniem powierzchni otwartych (zewnętrznych).
    The influence of selected factors on drying ceramic moulds applied in the investment casting technology was determined by the gravimetric method. It was found that each successive layer, of a similar thickness, is drying longer than the previous one. The drying time of layers forming closed spaces is several times longer as compared with drying open surfaces (external).
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3 spec.; 197-202
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods of fabrication of medical models with complex spatial structures
    Metody wytwarzania modeli medycznych o złożonej strukturze przestrzennej
    Autorzy:
    Kudasik, T.
    Markowski, T.
    Markowska, O.
    Miechowicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/380657.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    product development
    vacuum casting
    rapid prototyping
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    rozwój produktu
    odlewanie próżniowe
    prototypowanie szybkie
    Opis:
    The process of creating medical models for experimental tests applying modern Rapid Prototyping methods is presented in the article. Respective Rapid Prototyping methods i.e. JS-PolyJet, Selective Laser Sintering (SLS), ProJet and Vacuum Casting (VS) methods are also characterised. The possibilities of using the above in model research and especially in photoelastic research on the examples of human skull top part and a fragment of syndesmosis of the skull are discussed. Rapid Prototyping and Rapid Tooling methods together with computer aided systems CAD/CAM make it possible to carry out numerical analysis and experimental tests on models of very complicated inside and outside shapes. RP techniques allow for fabricating medical models of a tissue structure of human skeleton bones. In case of photoelastic tests, when examined medical object can be destructed, RT techniques and precisely Vacuum Casting method allows for making medical models with reasonable prices and quantities adequate for experimental aims. There is a possibility of analyzing much bigger range of cases of loading regardless of the costs of experiment. Therefore applying Rapid Prototyping techniques for fabricating medical models allows for extending the possible applications of experimental tests in medicine.
    W artykule przedstawiono proces tworzenia modeli medycznych przeznaczonych do badań eksperymentalnych z wykorzystaniem nowoczesnych metod szybkiego prototypowania. Scharakteryzowano wybrane metody Rapid Prototyping począwszy od JS – PolyJet, SLS, ProJet, a skończywszy na metodzie odlewania próżniowego Vacuum Casting. Omówiono możliwości ich wykorzystania w badaniach modelowych, a w szczególności w badaniach elastooptycznych, na przykładzie górnej części czaszki i fragmentu więzozrostu czaszkowego. Metody szybkiego prototypowania RP i RT z jednoczesnym wykorzystaniem komputerowych systemów wspomagania CAD/CAM pozwalają na przeprowadzenie analizy numerycznej jak i badań eksperymentalnych na modelach o bardzo skomplikowanych kształtach wewnętrznych jak i zewnętrznych. Techniki RP umożliwiają wykonanie modeli medycznych z dokładnym odwzorowaniem kształtu analizowanych elementów szkieletu kostnego. W przypadku badań elastooptycznych, gdzie konieczne jest uszkodzenie badanych modeli medycznych, techniki RT oraz techniki VC, umożliwiają szybkie ich wykonanie w rozsądnych cenach i w ilości wystarczającej do badań. Dzięki temu istnieje możliwość przeanalizowania znacznie rozszerzonego zakresu przypadków obciążania przy ograniczeniu kosztów badań. Zastosowanie technik szybkiego prototypowania do wykonywania modeli medycznych rozszerza możliwości badań eksperymentalnych w medycynie.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 125-130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Compositions: Biodegradable Material – Synthetic Resins as Moulding Sands Binders
    Autorzy:
    Major-Gabryś, K.
    Grabarczyk, A.
    Dobosz, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/383210.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    innovative foundry technology
    innovative foundry material
    moulding sand
    furfuryl resin
    biodegradable material
    ochrona środowiska
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    masa formierska
    żywica furfurylowa
    materiał biodegradowalny
    Opis:
    Growing emission requirements are forcing the foundry industry to seek new, more environmentally friendly solutions. One of the solutions may be the technologies of preparing moulding and core sands using organic biodegradable materials as binders. However, not only environmental requirements grow but also those related to the technological properties of moulding sand. Advancing automation and mechanization of the foundry industry brings new challenges related to the moulding sands. Low elasticity may cause defects during assembly of cores or moulds by the manipulators. The paper presents the study of flexibility in the room temperature according to new method and resistance to thermal deformation of self-hardening moulding sands with furfuryl resin, containing biodegradable material PCL. The task of the new additive is to reduce the moulding sands harmfulness to the environment and increase its flexibility in the room temperature. The impact of the additive and the effect of the amount of binder on the properties of mentioned moulding sands were analysed. Studies have shown that the use of 5% of PCL does not change the nature of the thermal deformation curve, improves the bending strength of tested moulding mixtures and increases their flexibility at room temperature.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 75-78
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Content of Phenol in Foundry Resins by Pyrolysis Gas Chromatography-Mass Spectrometry Method
    Autorzy:
    Żymankowska-Kumon, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/382217.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    innovative foundry technology
    innovative foundry material
    gas chromatography
    pyrolysis
    phenol
    ochrona środowiska
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    chromatografia gazowa
    piroliza
    fenol
    Opis:
    In the foundry industry, many harmful compounds can be found, which as a result of gradual but long-term exposure to employees bring negative results. One of such compounds is phenol (aromatic organic compound), which its vapours are corrosive to the eyes, the skin, and the respiratory tract. Exposition to this compound also may cause harmful effects on the central nervous system and heart, resulting in dysrhythmia, seizures, and coma. Phenol is a component of many foundry resins, especially used in shell moulds in the form of resin-coated sands. In order to identify it, the pyrolysis gas chromatography-mass spectrometry method (Py-GC/MS) was used. The tests were carried out in conditions close to real (shell mould process – temperature 300°C). During the measurement, attention was focused on the appropriate selection of chromatographic analysis conditions in order to best separate the compounds, as it is difficult to separate the phenol and its derivatives. The identification of compounds was based on own standards.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 83-86
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure of Cast High-Manganese Steel Containing Titanium
    Autorzy:
    Tęcza, G.
    Garbacz-Klempka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382715.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    cast high manganese steel
    primary carbides
    microhardness
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    stal wysokomanganowa
    węgliki pierwotne
    mikrotwardość
    Opis:
    Widely used in the power and mining industry, cast Hadfield steel is resistant to wear, but only when operating under impact loads. Components made from this alloy exposed to the effect of abrasion under load-free conditions are known to suffer rapid and premature wear. To increase the abrasion resistance of cast high-manganese steel under the conditions where no dynamic loads are operating, primary titanium carbides are formed in the process of cast steel melting, to obtain in the alloy after solidification and heat treatment, the microstructure composed of very hard primary carbides uniformly distributed in the austenitic matrix of a hardness superior to the hardness of common cast Hadfield steel. Hard titanium carbides ultimately improve the wear resistance of components operating under shear conditions. The measured microhardness of the as-cast matrix in samples tested was observed to increase with the increasing content of titanium and was 380 HV0.02 for the content of 0.4%, 410 HV0.02 for the content of 1.5% and 510 HV0.02 for the content of 2 and 2.5%. After solution heat treatment, the microhardness of the matrix was 460÷480 HV0.02 for melts T2, T3 and T6, and 580 HV0.02 for melt T4, and was higher than the values obtained in common cast Hadfield steel (370 HV0.02 in as-cast state and 340÷370 HV0.02 after solution heat treatment). The measured microhardness of alloyed cementite was 1030÷1270 HV0.02; the microhardness of carbides reached even 2650÷4000 HV0.02.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 163-168
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Masy formierskie z nowymi spoiwami nieorganicznymi – ocena ekologiczna w aspekcie środowiska pracy
    Moulding sands with new inorganic binders – ecology assessment in the aspect of work environment
    Autorzy:
    Szanda, I.
    Żmudzińska, M.
    Faber, J.
    Perszewska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380970.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    masa formierska
    spoiwo nieorganiczne
    środowisko pracy
    innovative foundry material
    innovative foundry technology
    moulding sand
    inorganic binder
    work environment
    Opis:
    Rozwój gospodarki i przemysłu, wprowadzanie nowych technologii i materiałów powoduje często wzrost zagrożenia czynnikami szkodliwymi dla ludzi i środowiska. Pracownicy zatrudnieni na stanowisku zalewacza w odlewni należą do grupy o zwiększonym ryzyku zawodowym. Stosowane masy formierskie podczas zalewania form ciekłym metalem są źródłem emisji szkodliwych, toksycznych a także rakotwórczych (benzen, WWA) związków chemicznych. W referacie przedstawiono wyniki badań stężeń związków chemicznych emitowanych w procesie wykonywania odlewów ze stopów aluminium oraz z mosiądzu, z zastosowaniem mas formierskich z nowymi spoiwami nieorganicznymi. Określone wielkości wskaźników narażenia porównano z wartościami dopuszczalnymi. Pozwoliło to na ocenę wpływu zastosowanych mas na środowisko pracy. Otrzymane wyniki odniesiono również do emisji zanieczyszczeń przy zalewaniu form wykonywanych z masy z żywicą furanową i masy z bentonitem i pyłem węglowym.
    The development of economy and industry introducing new technologies and materials often means the increased threat of occurrence of factors harmful to humans and environment. Workers employed in foundries as mould pourers are the group of high professional risk. Foundry moulding sands when poured with liquid metal are a source of the emission of harmful, toxic and carcinogenic (benzene, PAHs) compounds. The paper presents the results of studies on the concentration of chemical compounds emitted in the process of casting aluminium alloys and brass using moulding sands with the new inorganic binders. The specific values of the exposure indices were compared with the limit values. This enabled an assessment of the impact of moulding sands on work environment. The obtained results were compared with the values of contaminants emitted when pouring foundry moulds made from furan sands and bentonite sands with an addition of coal dust.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 179-184
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recycling of waste moulding sands with new binders
    Autorzy:
    Izdebska-Szanda, I.
    Angrecki, M.
    Palma, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381987.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry material
    innovative foundry technology
    modified inorganic binder
    reclamability
    management
    post reclamation waste
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    spoiwo nieorganiczne
    odpad porekultywacyjny
    Opis:
    This paper presents the results of research which is part of studies carried out under the project POIG.01.01.02-00-015/09 "Advanced Materials and Technologies", one of the aims of which is to introduce new, environment-friendly, inorganic binders to the production of castings from non-ferrous metals. The paper presents the results of research on the management of waste moulding sands prepared according to the new technology, including their multiple reclamation and management of post-reclamation waste. Studies of multiple reclamation are a continuation of the preliminary research described earlier. The programme of the studies described in this paper also included validation of the results under industrial conditions.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2; 43-48
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Casting Die Cooling on Solidification Process and Microstructure of Hypereutectic Al-Si Alloy
    Autorzy:
    Władysiak, R.
    Kozuń, A.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380676.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    casting die cooling
    water mist
    hypereutectic silumin
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewanie kokilowe
    mgła wodna
    silumin nadeutektyczny
    Opis:
    The work is a continuation of research concerning the influence of intensive cooling of permanent mold in order to increase the casting efficiency of aluminium alloys using the multipoint water mist cooling system. The paper presents results of investigation of crystallization process and microstructure of synthetic hypereutectic alloys: AlSi15 and AlSi19. Casts were made in permanent mold cooled with water mist stream. The study was conducted for unmodified silumins on the research station allowing the cooling of the special permanent probe using a program of computer control. Furthermore the study used a thermal imaging camera to analyze the solidification process of hypereutectic silumins. The study demonstrated that the use of mold cooled with water mist stream allows in wide range the formation of the microstructure of hypereutectic silumins. It leads to higher homogeneity of microstructure and refinement of crystallizing phases and also it increases subsequently the mechanical properties of casting.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 175-180
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a New Tool Material for High Pressure Die Casting
    Autorzy:
    Herman, A.
    Zikmund, P.
    Tatíček, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/382710.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    metallography
    die material
    HPDC technology
    wear resistant alloy
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    metalografia
    odlewanie ciśnieniowe
    stop odporny na ścieranie
    Opis:
    The paper describes existing requirements for tool materials. In the light of experience with these supplied materials, we have demonstrated their considerable influence on the life of molds for die casting technology. From this research came the evaluation methodology of these tool materials which has been used for directing the development of a new material. Based on the new regulation of the chemical composition a sample was casted and forged after that. Then was determined the process of heat treatment and from a block of this material a mold insert was produced. This insert is now being tested in production.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 23-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Achieving Control of Coating Process in your Foundry
    Autorzy:
    Di Muoio, G. L.
    Tiedje, N. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/383283.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative moulding technology
    innovative moulding material
    quality management
    coating process control
    sand compaction
    coating penetration
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    zarządzanie jakością
    zagęszczanie masy
    Opis:
    Achieving control of coating thickness in foundry moulds is needed in order to guarantee uniform properties of the mould but also to achieve control of drying time. Since drying time of water based coatings is heavily dependent on the amount of water present in the coating layer, a stable coating process is prerequisite for a stable drying process. In this study, we analyse the effect of different variables on the coating layer properties. We start by considering four critical variables identified in a previous study such as sand compaction, coating density, dipping time and gravity and then we add centre points to the original experimental plans to identify possible non-linear effects and variation in process stability. Finally, we investigate the relation between coating penetration (a variable that is relatively simple to measure in production) and other coating layer thickness properties (relevant for the drying process design). Correlations are found and equations are provided. In particular it is found that water thickness can be directly correlated to penetration with a simple linear equation and without the need to account for other variables.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 110-114
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taguchi Approach for Optimization of Parameters that Reduce Dimensional Variation in Investment Casting
    Autorzy:
    Bansode, S. N.
    Phalle, V. M.
    Mantha, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381195.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    investment casting
    dimensional accuracy
    Taguchi method
    optimisation
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewnictwo
    dokładność wymiarowa
    metoda Taguchi
    optymalizacja
    Opis:
    Variation in final casting dimensions is a major challenge in the investment casting industry. Additional correction operations such as die tool reworking as well as coining operations affect foundry productivity significantly. In this paper influence of basic parameters such as wax material, mould material, number of ceramic coats and feed location on the dimensional accuracy of stainless-steel casting has been investigated. Two levels of each factor were chosen for experimental study. Taguchi approach has been used to design the experiment and to identify the optimal condition of each parameter for reduced dimensional deviation. Analysis of variance has been carried out to determine the contribution of each process parameter. The result reports that selected parameters have significant effect on the dimensional variability of investment casting. Mould material is the dominant parameter with the largest contribution followed by number of ceramic coats and wax material whereas feed location is having negligible contribution.
    Źródło:
    Archives of Foundry Engineering; 2019, 1; 5-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature and microstructure characteristics of silumin casting AlSi9 made with investment casting method
    Autorzy:
    Pietrowski, S.
    Rapiejko, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/380337.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    lost wax molding
    investment casting
    silumin casting
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    metoda traconego wosku
    odlewnictwo precyzyjne
    odlew siluminowy
    Opis:
    This work presents the research result of the temperature distribution and the microstructure in certain parts of the field-glass body frame casting made from silumin AlSi9 using the investment casting method in the ceramic mould. It was proved that the highest temperature of the silumin appears in the sprue in which the silumin is in the liquid-solid state, though the process of silumin crystallization in the casting is finished. It was stated that in certain elements of the casting the side opposite to the runner crystallizes and cools fastest. The differences in the rate of crystalline growth and cooling of certain casting elements cause different microstructure in them which can also influence the mechanic properties. It is necessary to state that the temperature of the initial heating of the ceramic mold equal to 60ºC guarantees obtaining of the castings without defects and of little porosity. Incomplete modification of the silumin with strontium causes silica precipitation to appear close to the spherical ones.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 177-186
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Castings in Pit Furnaces for Heat Treatment
    Autorzy:
    Drotlew, A.
    Piekarski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/380488.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    heat treatment plant
    cast grate
    pit furnace
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    zakład obróbki cieplnej
    paleta odlewnicza
    piec grzewczy
    Opis:
    The article presents examples of typical designs of the cast technological equipment used in pit furnaces for the heat treatment of metals and alloys. The equipment consists of a set of castings connected together in a proper way and used for the formation and transport of charge, which consists of the heat treated parts. Typical equipment has the shape of a cylinder. Usually it comprises a basic pallet (carrier) completed with other elements, i.e. intermediate pallets, rods, spacers, cross-bars and hooks, their number depending on the number and shape of heat-treated products and on production volume. The simplest design solution is to use a cylindrical basket where heat treated products are arranged in a loose configuration. The majority of elements forming the furnace equipment are castings produced in sand molds. Some of them were designed and manufactured in a Foundry of the West Pomeranian University of Technology in Szczecin.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 11-14
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical and Thermal Deformation of Hot-box Moulding Sands
    Autorzy:
    Grabarczyk, A.
    Major-Gabryś, K.
    Dobosz, S. M.
    Jakubski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381390.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry material
    innovative foundry technology
    mechanical properties
    moulding sand deformation
    hot distortion
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    właściwości mechaniczne
    odkształcenie masy formierskiej
    deformacja cieplna
    Opis:
    The constantly developing and the broadly understood automation of production processes in foundry industry, creates both new working conditions - better working standards, faster and more accurate production - and new demands for previously used materials as well as opportunities to generate new foundry defects. Those high requirements create the need to develop further the existing elements of the casting production process. This work focuses on mechanical and thermal deformation of moulding sands prepared in hot-box technology. Moulding sands hardened in different time periods were tested immediately after hardening and after cooling. The obtained results showed that hardening time period in the range 30-120 sec does not influence the mechanical deformation of tested moulding sands significantly. Hot distortion tests proved that moulding sands prepared in hot-box technology can be characterized with stable thermal deformation up to the temperature of circa 320 °C.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 55-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Żaroodporne powłoki Al-Si wytworzone metodą zawiesinową
    Heat-resisting Al-Si coatings manufactured with the slurry method
    Autorzy:
    Kochmańska, A.
    Gawdzińska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/381583.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    powłoka żaroodporna
    metoda zawiesinowa
    korozja wysokotemperaturowa
    innovative foundry material
    innovative foundry technology
    heat resisting coating
    slurry method
    high temperature corrosion
    Opis:
    Podniesienie odporności elementów maszyn i urządzeń na korozję wysokotemperaturową uzyskuje się między innymi stosując powłoki żaroodporne na bazie aluminium. Wytworzenie powłoki dyfuzyjnej o budowie gradientowej sprzyja większej żywotności powłok i jednocześnie elementów zabezpieczanych. Detale bardzo często są odlewane i nie poddawane obróbce mechanicznej. Nałożenie powłoki powinno być możliwe na powierzchni surowego odlewu. W pracy przedstawiono wyniki badań nad wytwarzaniem ochronnych powłok aluminiowo-krzemowych nakładanych metodą zawiesinową na żarowytrzymałe staliwo GX30NiCrSi30-20, stop niklu Inconel 617 oraz stop tytanu TiAl6V4. Tą samą metodą wytworzono powłoki na różnych podłożach. W celu uzyskania powłok ochronnych zastosowano metodę zawiesinową. W skład zawiesiny wchodzą proszki metali, spoiwo organiczne oraz topnik. Elementy pokryte zawiesiną o tym samym składzie wygrzewano w piecu w atmosferze powietrza w odpowiednim czasie i temperaturze. Otrzymane powłoki posiadają budowę dwustrefową. Uzyskane powłoki poddano badaniom strukturalnym opisującym: budowę strefową i skład chemiczny. Określono również grubość i mikrotwardość powłok.
    Increase in high temperature corrosion resistance is achieved, among other things, by application of heat-resisting, aluminum-based coatings. Production of a diffusion coating of gradient structure favors longer life of both coatings and preserved elements. Parts are very often casted and not subjected to machining. Application of a coating should be possible on the raw surface of the casting. This paper presents results of a study of manufacturing of protective Al-Si coatings, applied using the slurry method on a high-temperature creep resisting cast steel GX30NiCrSi30-20, a nickel alloy-Inconel 617 and a titanium alloy TiAl6V4. The same method was used to apply coatings on different surfaces. To obtain protective coatings, the slurry method was used. The slurry is composed of metal powders, an organic binder and a fusing agent. Elements coated with slurry of the same composition were hold in a furnace in air atmosphere, at an appropriate temperature and for an appropriate time period. Obtained coatings have a bizonal structure. The coatings were subjected to structural testing, describing the zonal structure and the chemical constitution. Thickness and microhardness of the coatings were also determined.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 107-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Sand Grains Properties on Electrical Properties of Moulding Sand with Inorganic Binder
    Autorzy:
    Opyd, B.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/381698.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    microwaves
    moulding sand
    sand grain
    water glass
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    mikrofale
    masa formierska
    osnowa piaskowa
    szkło wodne
    Opis:
    The paper presents the results of basic research on the influence of the properties of sand grains on electrical properties of water glass moulding sands. It shows electrical properties of the main component – sand grains, crucial to the kinetics of moulding sands heating, such as permittivity εr and loss factor tgδ. Measurements were carried out with the use of the perturbation method for silica, chromite and olivine sands of different mineral, chemical composition and particle size distribution, as well as for moulding sands with water glass grade 145. Analysis of the results of measurements of electrical properties shows that all moulding sands are characterized by a similar permittivity εr and loss factor tgδ. It was found that the electrical properties and the quantity and quality of other components may have a decisive influence on the effectiveness and efficiency of the microwave heating of moulding sands with sand grains. In determining the ability to efficiently absorb the microwave radiation for mixtures which moulding sands are, the impact of all components influencing their individual technological parameters should be taken into account.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 43-46
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of Ferritic Nodular Cast Iron Containing About 5-6% Aluminium
    Autorzy:
    Soiński, M. S.
    Kordas, P.
    Skurka, K.
    Jakubus, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/379726.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    metallography
    Al-alloyed cast iron
    spheroidization
    graphite precipitates
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    metalografia
    żeliwo stopowe
    sferoidyzacja
    wydzielenia grafitu
    Opis:
    The work presents results of investigations concerning the production of cast iron containing about 5-6% aluminium, with the ferritic matrix in the as-cast state and nodular or vermicular graphite precipitates. The examined cast iron came from six melts produced under the laboratory conditions. It contained aluminium in the amount of 5.15% to 6.02% (carbon in the amount of 2.41% to 2.87%, silicon in the amount of 4.50% to 5.30%, and manganese in the amount of 0.12% to 0.14%). After its treatment with cerium mixture and graphitization with ferrosilicon (75% Si), only nodular and vermicular graphite precipitates were achieved in the examined cast iron. Moreover, it is possible to achieve the alloy of pure ferritic matrix, even after the spheroidizing treatment, when both the aluminium and the silicon occur in cast iron in amounts of about 5.2÷5.3%.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 141-146
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Quartz Sand Quality on Bending Strength and Thermal Deformation of Moulding Sands with Synthetic Binders
    Autorzy:
    Dobosz, S. M.
    Grabarczyk, A.
    Major-Gabryś, K.
    Jakubski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380092.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    quartz sand
    moulding sand
    synthetic resin
    hot distortion
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    piasek kwarcowy
    masa formierska
    żywica syntetyczna
    Opis:
    Modern techniques of castings production, including moulding sands production, require a strict technological regime and high quality materials. In the case of self-hardening moulding sands with synthetic binders those requirements apply mainly to sand, which adds to more than 98% of the whole moulding sand mixture. The factors that affect the quality of the moulding sands are both chemical (SiO2, Fe2O3 and carbonates content) and physical. Among these factors somewhat less attention is paid to the granulometric composition of the sands. As a part of this study, the effect of sand quality on bending strength Rgu and thermal deformation of self-hardening moulding sands with furfural and alkyd resin was assessed. Moulding sands with furfural resin are known [1] to be the most susceptible to the sand quality. A negative effect on its properties has, among others, high content of clay binder and so-called subgrains (fraction smaller than 0,1mm), which can lead to neutralization of acidic hardeners (in the case of moulding sands with furfuryl resin) and also increase the specific surface, what forces greater amount of binding agents. The research used 5 different quartz sands originating from different sources and characterized with different grain composition and different clay binder content.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Materials for Reformer Furnace Tubes. History of evolution
    Autorzy:
    Garbiak, M.
    Jasiński, W.
    Piekarski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/380600.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    damage
    reformer furnace tubes
    Ni-Cr austenitic cast steel
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    uszkodzenie
    piec rurowy
    staliwo austenityczne
    Opis:
    The paper discusses progress that has been made over the past sixty years in increasing the service life of centrifugally cast, creepresistant tubes operating in reformer furnaces. Attention was mainly focused on the principles of selection of the chemical composition of castings to improve their creep behaviour. The reasons accounting for withdrawal of tubes from service were indicated. Examples of chemical composition and mechanical properties obtained in creep-resistant Ni-Cr cast steel used by the leading European tube manufacturers were stated. Trends in current research aiming at further improvement of the tube performance characteristics were mentioned.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 47-52
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Impact of Microwave Penetration Depth on the Process of Heating the Moulding Sand with Sodium Silicate
    Autorzy:
    Nowak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380638.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry material
    innovative foundry technology
    penetration depth
    microwaves
    electrical permittivity
    moulding sand
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    głębokość wnikania
    mikrofale
    przenikalność elektryczna
    masa formierska
    Opis:
    This paper presents the impact of microwave penetration depth on the process of heating the moulding sand with sodium silicate. For each material it is affected by: the wavelength in vacuum and the real and imaginary components of the relative complex electrical permittivity εr for a selected measurement frequency. Since the components are not constant values and they change depending on the electrical parameters of materials and the frequency of the electromagnetic wave, it is indispensable to carry out laboratory measurements to determine them. Moreover, the electrical parameters of materials are also affected by: temperature, packing degree, humidity and conductivity. The measurements of the dielectric properties of moulding sand with sodium silicate was carried out using the perturbation method on a stand of waveguide resonance cavity. The real and imaginary components of the relative complex electrical permittivity was determined for moulding sand at various contents of sodium silicate and at various packing degrees of the samples. On the basis of the results the microwave penetration depth of moulding sand with sodium silicate was established. Relative literature contains no such data that would be essential to predicting an effective process of microwave heating of moulding sand with sodium silicate. Both the packing degree and the amount of sodium silicate in moulding sand turned out to affect the penetration depth, which directly translates into microwave power density distribution in the process of microwave heating of moulding sand with sodium silicate.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 115-118
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykonywanie odlewów z żeliwa sferoidalnego w formach warstwowych z ekologicznych mas formierskich
    Casting ductile iron in layer moulds made from ecological sands
    Autorzy:
    Rączka, M.
    Gandurski, K.
    Isendorf, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/381617.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    ochrona środowiska
    żeliwo sferoidalne
    forma dwuwarstwowa
    badania odlewu
    innovative foundry material
    innovative foundry technology
    environment protection
    ductile iron
    two layer mould
    Opis:
    Artykuł zawiera wyniki uzyskane podczas badań wykonywanych w ramach projektu celowego w odlewni Hardtop w Charsznicy. Celem badań było opracowanie technologii wykonania dobrej jakości odlewów z żeliwa sferoidalnego przy jednoczesnym zachowaniu skutecznych technik ochrony środowiska. Przedstawiono badania wykonywania odlewów o masie od 1 do 300 kg z żeliwa sferoidalnego gatunek 400-15, 500-7 z zastosowaniem form dwuwarstwowych, gdzie masę przymodelową i rdzeniową stanowi masa z alkalicznym spoiwem organicznym, a masę wypełniającą – masa ze spoiwem nieorganicznym - geopolimerowym. Zastosowano uproszczoną regenerację masy z możliwością wykorzystania odzyskanego regeneratu do masy wypełniającej. Przeprowadzono dobór metody sferoidyzacji i modyfikacji żeliwa odpowiednich dla warunków odlewni Hardtop. Wykonano serię próbną odlewów i przeprowadzono badania poprawności konstrukcji układów zalewania i zasilania z zastosowaniem otulin egzotermicznych na nadlewy. Badania potwierdziły słuszność przyjętej koncepcji wykonywania odlewów z żeliwa sferoidalnego w formach warstwowych przy zachowaniu maksymalnie 15% udziału mas ze spoiwem organicznym.
    The article contains the results of tests performed under the target project in Hardtop Foundry Charsznica. The objective of the tests and studies was to develop a technology of making high-quality ductile iron castings, combined with effective means of environmental protection. The studies presented in this article related to castings weighing from 1 to 300 kg made from ductile iron of grades 400-15 and 500-7, using two-layer moulds, where the facing and core sand was the sand with an alkaline organic binder, while backing sand was the sand with an inorganic geopolymer binder. A simplified method of sand reclamation was applied with possible reuse of the reclaim as an addition to the backing sand. The cast iron spheroidising treatment and inoculation were selected taking into account the specific conditions of Hardtop Foundry. A pilot batch of castings was made, testing the gating and feeding systems and using exothermic sleeves on risers. The study confirmed the validity of the adopted concept of making ductile iron castings in layer moulds, while maintaining the content of sand with an organic binder at a level of maximum 15%.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 163-168
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Temperature on the Result of Complex Modification of IN-713C Superalloy Castings
    Autorzy:
    Binczyk, F.
    Gradoń, P.
    Mańka, M.
    Findziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/383137.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Innovative casting material
    innovative casting technology
    nickel alloy IN-713C
    modification
    cobalt aluminate
    macrostructure
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop niklu IN-713C
    glinek kobaltu
    makrostruktura
    Opis:
    The paper presents the results of research on the determination of the effect of pouring temperature on the macrostructure of the castings subjected to complex (surface and volume) modification and double filtration. Tested castings were made of post-production scrap (gating system parts) of IN-713C superalloy. Tests included the evaluation of the number of grains per 1 mm2, mean grain surface area, shape factor and tensile strength. Casting temperature below 1470 °C positively influenced the modification effect. The grains were finer and the mechanical properties increased, especially for castings with thicker walls. On the other hand, manufacture of thin walled castings of high quality require pouring temperature above 1480 °C.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 13-16
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wear resistance of nodular cast iron with carbides
    Autorzy:
    Gumienny, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/381470.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    nodular cast iron
    carbides
    abrasive wear resistance
    adhesive wear resistance
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    żeliwo sferoidalne
    węgliki
    odporność na ścieranie
    Opis:
    In this paper results of abrasive and adhesive wear resistance of selected grades of nodular cast iron with carbides are presented. It was demonstrated, that the maximum wear resistance has got nodular cast iron with the microstructure of upper bainite, lower bainite and carbides. This cast iron with hardened steel and sulfonitrided steel is the most advantageous friction pair during adhesive wear testing. It was found, that the least advantageous friction pair is pearlitic nodular cast iron with carbides and normalized steel.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 81-88
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the Influence of Additions on the Formation of Microstructure of Al-Zn-Mg-Cu Alloys
    Autorzy:
    Pisarek, B. P.
    Czekaj, E.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381528.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    Al-Zn-Mg-Cu alloy
    TDA method
    hardness HB
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop Al-Zn-Mg-Cu
    metoda ATD
    Opis:
    The article presents the investigations of 7xxx aluminium alloys performed by the method of thermal and derivational analysis. The studies made it possible to identify the effect of the changes in the Cu concentration, the total Zn and Mg weight concentrations and the Zn/Mg weight concentration ratio on their crystallization process: the cooling as well as the kinetics and dynamics of the thermal process of cooling and crystallization. Metallographic studies were performed on the microstructure of the examined alloys and their HB hardness was measured. The evaluation of the changes was presented in reference to the model alloys EN AW-7003 and EN AW-7010, whose microstructure under the conditions of thermodynamic equilibrium are described by the phase diagrams: Al-Zn-Mg and Al-Zn-Mg-Cu. The performed investigations confirmed that the hardness HB of the examined alloys is mainly determined by the reinforcement of the matrix αAl by the introduced alloy additions and the presence of phases Θ(Al2Cu) and S(Al2CuMg) rich in copper, as well as η(MgZn2), in the examined alloys' microstructure. The increase of the amount of intermetallic phases precipitated in the microstructure of the examined alloys is caused, beside Cu, by the characteristic change of Zn wt. concentration and Mg. It was proposed that the process of one-stage thermal treatment of the examined alloys be introduced at a temperature of up to tJ-20 °C, which will prevent the exceedance of the solidus temperature.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 39-44
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza zmian strukturalnych w spoiwie skrobiowym sieciowanym na drodze fizycznej
    Analysis of Structural Changes in the Starch-Based Binder Cross-Linked by Physical Agents
    Autorzy:
    Kaczmarska, K.
    Grabowska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/381948.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    spoiwo polimerowe
    modyfikat skrobiowy
    sieciowanie
    spektroskopia FT-IR
    innovative foundry material
    innovative foundry technology
    polymer binder
    starch derivative
    crosslinking
    spectroscopy FT-IR
    Opis:
    W pracy przedstawiono analizę widm FT-IR dla spoiwa polimerowego na bazie modyfikatu skrobiowego. Widma zarejestrowano dla spoiwa przed i po usieciowaniu. Sieciowanie prowadzono na drodze fizycznej w podwyższonej temperaturze oraz w polu mikrofal. Na podstawie otrzymanych widm FT-IR stwierdzono, że podczas działania czynników fizycznych dochodzi do procesu odparowania wody rozpuszczalnikowej oraz powstawania międzycząsteczkowych sieciujących wiązań wodorowych. Zaobserwowano, że w warunkach otoczenia również następuje powolne odparowanie rozpuszczalnika, jak też tworzenie się mostków wodorowych.
    The paper presents an analysis of FT-IR spectra for the polymeric binder based on a starch derivative. Spectra were recorded for the binder before and after cross-linking. Cross-linking was carried out by physical means at elevated temperature and under microwave irradiation. On the basis of FT-IR spectra, it was found the evaporation of solvent (water) and the formation of cross-linking intermolecular hydrogen bonds were occurred after the use of physical factors. It was observed that under ambient conditions the solvent was evaporated (in slow process of evaporation), and formation of hydrogen bridges was also occurred.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3 spec.; 51-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Moulding Sand with Inorganic Cordis Binder for Ablation Casting
    Autorzy:
    Hosadyna-Kondracka, M.
    Major-Gabryś, K.
    Kamińska, J.
    Grabarczyk, A.
    Angrecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382039.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    ablation casting
    moulding sand
    inorganic binder
    thermal curing
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewanie ablacyjne
    masa formierska
    spoiwo nieorganiczne
    utwardzanie termiczne
    Opis:
    The essence of ablation casting technology consists in pouring castings in single-use moulds made from the mixture of sand and a water-soluble binder. After pouring the mould with liquid metal, while the casting is still solidifying, the mould destruction (washing out, erosion) takes place using a stream of cooling medium, which in this case is water. This paper focuses on the selection of moulding sands with hydrated sodium silicate for moulds used in the ablation casting. The research is based on the use of Cordis binder produced by the Hüttenes-Albertus Company. It is a new-generation inorganic binder based on hydrated sodium silicate. Its hardening takes place under the effect of high temperature. As part of the research, loose moulding mixtures based on the silica sand with different content of Cordis binder and special Anorgit additive were prepared. The reference material was sand mixture without the additive. The review of literature data and the results of own studies have shown that moulding sand with hydrated sodium silicate hardened by dehydration is characterized by sufficient strength properties to be used in the ablation casting process. Additionally, at the Foundry Research Institute in Krakow, preliminary semi-industrial tests were carried out on the use of Cordis sand technology in the manufacture of moulds for ablation casting. The possibility to use these sand mixtures has been confirmed in terms of both casting surface quality and sand reclamation.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 110-115
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The framework of agent-based negotiation platform for foundries cooperating in supply chain
    Autorzy:
    Kluska-Nawarecka, S.
    Regulski, K.
    Rojek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/379687.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    innovative foundry technologies
    innovative foundry materials
    ontology
    agent technology
    production support
    technologia informacyjna
    przemysł odlewniczy
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    ontologia
    technologia agentowa
    wspomaganie produkcji
    Opis:
    This paper concerns the domain of contracts in the metallurgy and heavy industry, that are the form of deals making between cooperating companies being suppliers and consumers of some goods. From a general point of view cooperation enables for small companies to realize orders that are too large for an individual producer, but contract negotiations, further scheduling and support of production are usually too difficult and complicated. This paper presents a proposition of an information system, that should make cooperation between companies more available. Such system should be distributed among cooperating producers, what is the reason for choosing of the agent technology as the main software paradigm. This system should also support interchanging of information in many norms and technical standards, what results in the use of ontology concerning metallurgy and heavy industry.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 73-78
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure of AlSi20 Alloy in Heat Treated Die Casting
    Autorzy:
    Władysiak, R.
    Kozuń, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382310.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    die casting
    water mist cooling
    hypereutectic silumin
    microstructure
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewanie ciśnieniowe
    chłodzenie mgłą wodną
    silumin nadeutektyczny
    mikrostruktura
    Opis:
    The work is a continuation of research on the use of water mist cooling in order to increase efficiency of die-casting aluminum alloys using multipoint water mist cooling system. The paper presents results of investigation on crystallization process and microstructure of synthetic hypereutectic AlSi20 alloy. Casts were made in permanent mold cooled a with water mist stream. The study was conducted for unmodified AlSi20 alloy and a modified one with phosphorus, titanium and boron on the research station allowing sequential multipoint cooling using a dedicated program of computer control. The study demonstrated that the use of mold cooled with water mist stream and solution heat treatment allows in wide range for the formation of the microstructure of hypereutectic silumins. It leads to the growth of microstructure refinement and spheroidizing of phases in the casting.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 113-118
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of the Bonding Zone in a ZE41/AlSi12 Joint Fabricated by Liquid- Solid Compound Casting
    Autorzy:
    Mola, R.
    Bucki, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381097.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    compound casting process
    magnesium alloy
    aluminum alloy
    bonding zone
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    proces odlewania
    stop magnezu
    stop aluminium
    strefa złącza
    Opis:
    The study involved using the liquid-solid compound casting process to fabricate a lightweight ZE41/AlSi12 bimetallic material. ZE41 melt heated to 660 °C was poured onto a solid AlSi12 insert placed in a steel mold. The mold with the insert inside was preheated to 300 °C. The microstructure of the bonding zone between the alloys was examined using optical microscopy and scanning electron microscopy. The chemical composition was determined through linear and point analyses with an energy-dispersive X-ray spectroscope (EDS). The bonding zone between the magnesium and aluminum alloys was about 250 μm thick. The results indicate that the microstructure of the bonding zone changes throughout its thickness. The structural constituents of the bonding zone are: a thin layer of a solid solution of Al and Zn in Mg and particles of Mg-Zn-RE intermetallic phases (adjacent to the ZE41 alloy), a eutectic region (Mg17(Al,Zn)12 intermetallic phase and a solid solution of Al and Zn in Mg), a thin region containing fine, white particles, probably Al-RE intermetallic phases, a region with Mg2Si particles distributed over the eutectic matrix, and a region with Mg2Si particles distributed over the Mg-Al intermetallic phases matrix (adjacent to the AlSi12 alloy). The microstructural analysis performed in the length direction reveals that, for the process parameters tested, the bonding zone forming between the alloys was continuous. Low porosity was observed locally near the ZE41 alloy. The shear strength of the AZ91/AlSi17 joint varied from 51.3 to 56.1 MPa.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 203-208
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technologia wytapianych modeli w zastosowaniu dla stopów miedzi
    Investment Casting Technology Applied to Copper Alloys
    Autorzy:
    Rzadkosz, S.
    Kranc, M.
    Garbacz-Klempka, A.
    Kozana, J.
    Piękoś, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381118.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    metalografia
    wada odlewu
    technologia wytapianych modeli
    stop miedzi
    innovative foundry material
    innovative foundry technology
    metallography
    casting defect
    investment casting technology
    copper alloy
    Opis:
    Technologia wytapianych modeli należy do najstarszych technologii odlewniczych. Historycznie służyła do odlewania narzędzi, broni i ozdób. Model wykonany z wosku pszczelego oblepiano gliną suszono i wypalano. Otrzymywano odlewy o dużej gładkości powierzchni, dokładności i precyzji wykonania ornamentu. Metodą tą odlewano niewielkie kilkugramowe odlewy jak i wielkogabarytowe pomniki. Współcześnie ta technologia jest wykorzystywana w wielu ważnych gałęziach produkcji zarówno artystycznej, jak i przemysłowej. Szczególnie w przemyśle zbrojeniowym, lotniczym, motoryzacyjnym, energetycznym, budowlanym, a nawet kosmicznym. W pracy przedstawiono wyniki badań i eksperymentów, prowadzonych w zakresie technologii odlewnictwa miedzi i stopów miedzi z zastosowaniem metody wytapianych modeli, zarówno w aspekcie historycznym, jak i współczesnej praktyki przemysłowej. Przykładowo przedstawiono analizę wybranych elementów dawnych technologii, form i odlewów wytworzonych w epoce brązu oraz wyniki badań dotyczące aktualnie produkowanych odlewów dla branży energetycznej. Jakość odlewów została oceniona na podstawie przeprowadzonych badań z zakresu mikrostruktury, składu chemicznego, przewodności elektrycznej i zawartości tlenu.
    Investment casting technology belongs to the oldest casting techniques. Historically, it was used for casting tools, weapons and ornaments. A model, made from beeswax, was covered in loam, dried and fired. The casts obtained were characterised by high surface smoothness, accuracy and precision of its ornaments. This method was used for relatively small casts as well as for big monuments. Nowadays, this technology is used in many fields of manufacturing, both artistic and industrial, especially in ornaments, aviation, automotive, power, construction and even space industry. This work presents the results of research and experiments conducted in the field of casting technology of copper and copper alloys, applying the investment casting method, both in its historical aspect and modern industrial practice. An exemplary analysis was presented of the chosen elements of the old technologies, moulds and casts, as well as the results of casts made currently for the power industry. The casts quality was evaluated based on the research of their microstructure, chemical composition, electrical conductivity and oxygen content.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3 spec.; 143-148
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nowoczesne materiały kompozytowe zastępujące tradycyjne materiały odlewnicze
    Modern composites to replace traditional casting materials
    Autorzy:
    Mierzwa, P.
    Olejnik, E.
    Janas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381945.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    MMCs
    kompozyt in situ
    materiał odlewniczy
    odporność na ścieranie
    staliwo Hadfielda
    węglik tytanu
    in situ composite
    casting material
    abrasion resistant
    cast manganese steel
    titanium carbide
    Hadfield cast steel
    Opis:
    W pracy przedstawiono możliwość przekształcenia klasycznych materiałów odlewniczych w kompozyty in situ. Materiały te znajdują coraz szersze zastosowanie w różnych gałęziach przemysłu, a szczególnie w przemyśle wydobywczym. Przekształcenie stopu klasycznego w materiał kompozytowy, wpływa wyraźnie na poprawę jego właściwości mechanicznych. W wyniku przeprowadzonych badań uzyskano nowy materiał inżynierski, który wytworzono metodą syntezy objętościowej z wykorzystaniem reakcji SHSB. Zastosowana metoda pozwala umocnić klasyczne materiały odlewnicze zarówno lokalnie, jak również objętościowo. Umocnienie to polega na syntezie cząstek ceramicznych w kąpieli metalowej, bezpośrednio w jednoetapowym procesie odlewniczym. Materiałem wyjściowym do badań było staliwo manganowe, które w wyniku przeprowadzonej reakcji syntezy, przekształcono w kompozyt typu MMCs. Fazą wzmacniającą nowego materiału były ceramiczne cząstki węglika tytanu. Prezentowane w niniejszej pracy wyniki, wskazują na znaczną poprawę zarówno właściwości mechanicznych, jak i użytkowych otrzymanego materiału kompozytowego, dotyczy to takich parametrów, jak twardości i odporności na ścieranie.
    The study presents an opportunity to transform the traditional casting materials into in situ composites, the latter ones being currently used on a growing scale in various sectors of the industry, especially in the extractive industries. The transformation of standard alloy into a composite considerably improves the mechanical properties. As a result of the experiment, a new engineering material was produced by the method of bulk synthesis and an SHSB reaction. The method enables hardening of the traditional casting materials, both locally and in the whole volume of the material. The hardening is obtained by the synthesis of ceramic particles in a metal bath, directly in a one-step casting process. The starting material for research was cast manganese steel which, as a result of the reaction of synthesis, was converted into an MMCs type composite. The reinforcing phase in the new material were ceramic particles of titanium carbide. The results presented in this paper show a significant improvement in both mechanical and performance properties of the composite material obtained, this also applying to parameters such as hardness and abrasive wear resistance.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 137-142
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use Thermal Analysis (TG/DTG/DSC) in the Study of Stability (Bio)Polymer Binder
    Analiza termiczna (TG/DTG/DSC) w badaniach stabilności spoiw (bio)polimerowych
    Autorzy:
    Grabowska, B.
    Grabowski, G.
    Kaczmarska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382971.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry material
    innovative foundry technology
    polymer binder
    foundry sand
    thermal analysis
    TG/DTG/DSC
    thermal degradation
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    spoiwo polimerowe
    masa formierskia
    analiza termiczna
    degradacja termiczna
    Opis:
    The fragment of investigations related to the thermal stability of new foundry polymer binders with biopolymer fractions is hereby presented. A sample of the foundry binding agent BioCo1, in a form of two-component polymer composition consisting of a modified biopolymer (polysaccharide) and a synthetic polymer (acrylic polymer), was subjected to the thermal analysis. Methods of thermal analyses (TG/DTG/DSC) were applied in investigations in order to perform the thermal degradation process of the tested BioCo1 binder sample by establishing thermal effects of transformations, structural changes and masses - occurring during its heating. Examinations were performed in the temperature range: -100–600 °C. It was found that the degradation process starts at a temperature app. 130 °C. The binding agent behaviour at increased temperatures is important in relation to the process of the moulding sand mould (with BioCo1 fraction) pouring with liquid metal.
    Przedstawiono wycinek badań związanych z określeniem termicznej stabilności nowych odlewniczych spoiw polimerowych z udziałem biopolimerów. Poddano analizie termicznej próbkę spoiwa odlewniczego BioCo1 w postaci dwuskładnikowej kompozycji polimerowej złożonej z modyfikowanego biopolimeru (polisacharydu) i polimeru syntetycznego (polimeru akrylowego). W badaniach wykorzystano metody analizy termicznej (TG/DTG/DSC) w celu przeprowadzenia procesu degradacji termicznej badanej próbki spoiwa BioCo1 poprzez ustalenie efektów cieplnych przemian zachodzących podczas jego ogrzewania, zmian strukturalnych oraz masy. Badania prowadzono w zakresie temperatury -100 – 600 °C. Ustalono, że proces degradacji rozpoczyna się od temperatury 130 °C. Przeprowadzona analiza termiczna spoiwa ma istotne znaczenie w odniesieniu do procesu zalewania ciekłym metalem formy z masy odlewniczej wiązanej spoiwem BioCo1.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3 spec.; 31-34
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Method of the moulding sands binding power assessment in two-layer moulds systems
    Metoda oceny wielkości siły wiązania mas w układzie form dwuwarstwowych
    Autorzy:
    Holtzer, M.
    Drożyński, D.
    Bobrowski, A.
    Makselon, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381632.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry material
    innovative foundry technology
    mechanical properties
    two layer mould
    moulding sand
    alkaline organic binder
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    właściwości mechaniczne
    forma dwuwarstwowa
    masa formierska
    alkaliczne spoiwo organiczne
    Opis:
    More and more foundry plants applying moulding sands with water-glass or its substitutes for obtaining the high-quality casting surface at the smallest costs, consider the possibility of implementing two-layer moulds, in which e.g. the facing sand is a sand with an organic binder (no-bake type) and the backing sand is a sand with inorganic binder. Both kinds of sands must have the same chemical reaction. The most often applied system is the moulding sand on the water-glass or geopolymer bases – as the backing sand and the moulding sand from the group of self-hardening sands with a resol resin – as the facing sand. Investigations were performed for the system: moulding sand with inorganic GEOPOL binder or moulding sand with water glass (as a backing sand) and moulding sand, no-bake type, with a resol resin originated from various producers: Rezolit AM, Estrofen, Avenol NB 700 (as a facing sand). The LUZ apparatus, produced by Multiserw Morek, was adapted for investigations. A special partition with cuts was mounted in the attachment for making test specimens for measuring the tensile strength. This partition allowed a simultaneous compaction of two kinds of moulding sands. After 24 hours of hardening the highest values were obtained for the system: Geopol binder - Avenol resin.
    Coraz więcej odlewni stosujących masy ze szkłem wodnym lub jego zamiennikami (np. spoiwo Rudal, dla uzyskania wysokiej jakości powierzchni odlewów przy możliwie najniższych kosztach, rozważa możliwość wdrożenia tzw. form dwuwarstwowych, w których np. masa przymodelowa jest masą ze spoiwem organicznym typu SMS, a masa wypełniająca masą ze spoiwem nieorganicznym. Oba rodzaje piasków muszą mieć taki sam charakter chemiczny. Najczęściej stosowanym układem jest masa na bazie szkła wodnego lub geopolimeru, jako masa wypełniająca oraz masa z grupy mas samoutwardzalnych z żywica rezolową jako masa przymodelowa. Badania prowadzono dla układu masa ze spoiwem nieorganicznym GEOPOL lub masa ze szkłem wodnym (jako masa wypełniająca) i masa typu SMS z żywicą rezolową pochodzącą od różnych producentów: Rezolit AM, Estrofen, Avenol 700 NB (jako masa przymodelowa). Do badań przystosowano aparat LUZ produkcji Multiserw Morek, w którym w przystawce do sporządzania kształtek z masy do pomiaru wytrzymałości na rozciąganie zamontowano specjalną nacinaną przegrodę, która umożliwiała równoczesne zagęszczenie dwóch rodzajów masy. Po 24 godzinach utwardzania wyraźnie najwyższe wartości uzyskano dla układu spoiwo Geopol - żywica Avenol.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2; 39-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ rodzaju, grubości pokrycia ceramicznego oraz gęstości zespołu modelowego na stopień zagazowania odlewu
    The Effect of the Type, the Ceramic Coating Thickness and the Pattern Set Density on the Degree of Gas Porosity in Casting
    Autorzy:
    Buczkowska, K.
    Just, P.
    Świniarska, J.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382587.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    tracona piana
    pokrycie ceramiczne
    pokrycie ogniotrwałe
    spienione tworzywo wielkocząsteczkowe
    zagazowanie odlewu
    innovative foundry material
    innovative foundry technology
    lost foam process
    ceramic coating
    gas porosity
    Opis:
    W pracy poruszone zostały zagadnienia związane z technologią lost foam. Zbadano wpływ rodzaju oraz grubości pokrycia ceramicznego a także gęstości zespołu modelowego na stopień zagazowania odlewu. Badania przeprowadzono dla dwóch rodzajów pokryć ceramicznych Disopast 4805/3 oraz Disopast 7759, które nakładano na modele ze spienionego polistyrenu w jednej, dwóch i trzech warstwach. Tak przygotowane modele wykorzystano do wytworzenia odlewów ze stopu AlSi11 w technologii lost foam. Otrzymane odlewy zbadano pod kątem stopnia ich zagazowania. Zaprezentowane badania wykazały zależności pomiędzy gęstością modelu, rodzajem i grubością zastosowanych powłok ceramicznych, a stopieniem zagazowania odlewów. Wykazano, że badane właściwości mają istotny wpływ na stopień zagazowania odlewu, jego porowatość oraz liczbę gazową. Poprzez odpowiedni dobór pokrycia, jego grubości, gęstości modelu, możliwe jest zminimalizowanie stopnia zagazowania odlewu.
    The study addressed the issues associated with lost foam casting technology. The effect of the type and thickness of the ceramic coating and the density of the pattern set of the degree of gas porosity in casting. The study was conducted for two types of ceramic coatings Disopast 4805/3 and Disopast 7759, which was applied to patterns with expanded polystyrene in one, two and three layers. Thus prepared patterns were used to produce castings alloy AlSi11 lost foam technology. The resulting castings were tested for their level of gas porosity. Presented studies have shown the relationship between the density of the polystyrene pattern, type and thickness of the applied ceramic coatings gas porosity and casting melt. It has been shown that investigated the properties have a significant impact on the degree of gas porosity in cast, its porosity and the gaseous number. Through an appropriate choice of coating, its thickness, density model, it is possible to minimize the degree of gassing casting.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2 spec.; 7-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Al2O3 Solid Phase on the Kinetics of Binding Ceramic Moulds
    Autorzy:
    Kolczyk, J.
    Zych, J.
    Jamrozowicz, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/380203.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    investment casting technology
    ultrasonic test
    ceramic mould
    aqueous binder
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    technologia wytapianych modeli
    pomiar ultradźwiękowy
    forma ceramiczna
    spoiwo wodniste
    Opis:
    The investigation results of the kinetics of binding ceramic moulds, in dependence on the solid phase content in the liquid ceramic slurries being 67, 68 and 69% - respectively, made on the basis of the aqueous binding agents Ludox AM and SK. The ultrasonic method was used for assessing the kinetics of strengthening of the multilayer ceramic mould. Due to this method, it is possible to determine the ceramic mould strength at individual stages of its production. Currently self-supporting moulds, which must have the relevant strength during pouring with liquid metal, are mainly produced. A few various factors influence this mould strength. One of them is the ceramic slurry viscosity, which influences a thickness of individual layers deposited on the wax model in the investment casting technology. Depositing of layers causes increasing the total mould thickness. Therefore, it is important to determine the drying time of each deposited layer in order to prevent the mould cracking due to insufficient drying of layers and thus the weakening of the multilayer mould structure.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 91-96
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancement of Heat Transfer in PCM by Cellular Zn-Al Structure
    Autorzy:
    Naplocha, K.
    Koniuszewska, A.
    Lichota, J.
    Kaczmar, J. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/382339.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    metal cellular foam
    porous Zn-Al structure
    investment casting
    heat transfer
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    pianka metalowa
    struktura porowata Zn-Al
    odlewanie precyzyjne
    wymiana ciepła
    Opis:
    Development of open cellular metal foam technology based on investment casting applying the polyurethane pattern is discussed. Technological process comprises preparing of the ceramic mold applying PUR foam as the pattern, firing of the mold, pouring of the liquid Zn-Al alloy into the mold and washing out of the ceramic material from cellular casting. Critical parameters such as the temperature of mold and poured metal, design of gating system affected by metalostatic pressure allowed to produce castings with cellular structure characterized by the open porosity. Metal cellular foams with the open porosity embedded in phase change material (PCM) enhance heat transfer and reduce time operations in energy storage systems. Charging and discharging were performed at the laboratory accumulator by heating and cooling with flowing water characterized by the temperatures of 97-100ºC. Temperature measurements were collected from 7 different thermocouples located in the accumulator. In relation to the tests with pure paraffin, embedding of the metal Zn-Al cellular foam in paraffin significantly decreases temperature gradients and melting time of paraffin applied as PCM characterized by the low thermal conductivity. Similarly, reduction of discharging time by this method improves the efficiency of thermal energy storage system applied in solar power plants or for the systems of energy efficient buildings.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected Technological Properties of Liquid Ceramic Slurries Used to Produce Moulds in the Replicast cs Technology
    Autorzy:
    Kaczorowski, R.
    Just, P.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380254.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Innovative casting material
    innovative casting technology
    precision casting
    thin walled ceramic mould
    apparent viscosity
    replicast CS technology
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    odlewanie precyzyjne
    forma ceramiczna cienkościenna
    lepkość pozorna
    technologia Replicast CS
    Opis:
    The study discusses the issues connected with the production of thin-walled ceramic slurry in the replicast cs technology. In the ceramic mould production process, a special role is played by the liquid ceramic slurry used to produce the first layer of the mould. The study examines selected technological properties of liquid ceramic slurries used to produce moulds in the replicas cs technology. The ceramic slurries for the tests were prepared based on the binders Ludox Px30 and Sizol 030, enriched with Refracourse flour. The wettability of the pattern's surface by the liquid ceramic slurry and the dependence of the apparent viscosity on the ceramic flour content in the mixture were determined. The wettability of the pattern surface by the liquid ceramic slurry was determined based on the measurement of the wetting angle. The angle was determined by means of an analysis of the computer image obtained with the use of a CDC camera.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 190-194
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Modification of Cored, Thin Walled Castings of Nickel Superalloy IN-713C
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Mańka, M.
    Findziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/381063.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Innovative casting material
    innovative casting technology
    nickel alloy IN-713C
    surface modification
    cobalt aluminate
    macrostructure
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop niklu IN-713C
    modyfikacja powierzchni
    glinek kobaltu
    makrostruktura
    Opis:
    In current casting technology of cored, thin walled castings, the modifying coating is applied on the surface of wax pattern and, after the removal of the wax, is transferred to inner mould surface. This way the modification leading to grain refinement occur on the surface of the casting. In thin walled castings the modification effect can also be seen on the other (external) side of the casting. Proper reproduction of details in thin walled castings require high pouring temperature which intensify the chemical reactions on the mould – molten metal interface. This may lead to degradation of the surface of the castings. The core modification process is thought to circumvent this problem. The modifying coating is applied to the surface of the core. The degradation of internal surface of the casting is less relevant. The most important factor in this technology is “trough” modification – obtaining fine grained structure on the surface opposite to the surface reproduced by the core.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 17-20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environmentally friendly mould technology
    Autorzy:
    Izdebska-Szanda, I.
    Palma, A.
    Angrecki, M.
    Żmudzińska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381950.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry materials
    innovative foundry technologies
    modified inorganic binder
    technological properties
    ecology
    post reclamation waste management
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    spoiwo nieorganiczne
    właściwości technologiczne
    ekologia
    odpad porekultywacyjny
    Opis:
    One of the factors that contribute to the development of foundry moulding technology is environmental protection. The related challenges are effectively satisfied by a new inorganic binder that has been designed for castings made of non-ferrous metal alloys. This article presents in a concise way the test results, showing the ecological character of the new binder at the stage of making moulds, pouring them with metal and cooling of castings, indicating the possibilities for an economic re-use of waste materials formed during practical application of this technology. The results were compared with the results obtained on the sands with organic binders. Studies were carried out under the project POIG.01.01.02-00-015/09 "Advanced materials and technologies."
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 37-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Production of Plaster Molds with Patternless Process Technology
    Autorzy:
    Pastirčák, R.
    Sládek, A.
    Kucharčíková, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/379940.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    automation in foundry
    robotics in foundry
    Patternless process technology
    plaster thermomold
    aluminium alloy
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    automatyka w odlewnictwie
    robotyka w odlewnictwie
    technologia Patternless
    stop aluminium
    Opis:
    The work deals with technology Patternless process that combines 3 manufacturing process mold by using rapid prototyping technology, conventional sand formation and 3D milling. It's unconventional technology that has been developed to produce large-sized and heavy duty castings weighing up to several tons. It is used mainly in prototype and small batch production, because eliminating production of models. The work deals with the production of blocks for making molds of gypsum and gypsum drying process technology Thermomold. Into blocks, where were made cavities by milling were casted test castings from AlSi10MgMn alloy by gravity casting. At machining of the mold cavity was varied feed rate of tool of cemented carbide. Evaluated was the surface roughness of test castings, that was to 5 micrometers with feed from 900 to 1300 mm/min. The dimensional accuracy of castings was high at feed rate of 1000 and 1500 mm/min did not exceed 0.025 mm.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Home Scrap Content on the Service Life of Equipment Used in High Pressure Die Casting of AZ91 Alloy
    Autorzy:
    Konopka, Z.
    Łągiewka, M.
    Zyska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383091.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    automation of casting process
    mechanization of casting process
    guard of environment
    casthouse rigging
    magnesium alloy
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    automatyzacja procesu odlewniczego
    mechanizacja procesu odlewniczego
    ochrona środowiska
    stop magnezu
    Opis:
    The results of estimation of home scrap addition in charge influence on durability and wear of casting instrumentation life in the high-pressure casting technology using the hot chamber machine of alloy of AZ91 are presented. The wear of the following elements of the casting instrumentation so-called "casting set" as: syphon, plunger, sliding-rings, nozzle and injection moulding nozzle was estimated. A wear was estimated quantitative by registering the number of mould injections for different charges to the moment of element damage supervision. A damage had to be at such level that liquidated an element from further exploitation and necessary was an exchange on new or regeneration. In a final result allowed it the detailed determination of durability of the applied rigging elements in dependence on the type of the applied type of melt. It is noticed, that together with the increase of home-scrap participation in the charge wear of pressure machine instrumentation elements increases.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 173-176
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of High-Temperature Treatment of Melt on the Composition and Structure of Aluminum Alloy
    Autorzy:
    Grachev, V. A.
    Turakhodjaev, N. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382645.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    heat treatment
    aluminum alloy structure
    fine-grained microstructure
    gasfired arc furnace
    electric arc furnace
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    obróbka cieplna
    stop aluminium
    mikrostruktura drobnoziarnista
    piec łukowy elektryczny
    piec łukowy gazowy
    Opis:
    The aim of the current study was to examine the structure of an alloy treated at various temperatures up to 2,000–2,100 °C. Among research techniques for studying alloy structure there were the electron and optical microstructure, X-ray structure, and spectral analysis, and for studying the developed furnace geometric parameters the authors employed mathematical modeling method. The research was performed using aluminum smelting gas-fired furnaces and electric arc furnaces. The objects of the study were aluminum alloys of the brand AK7p and AK6, as well as hydrogen and aluminum oxide in the melt. For determining the hydrogen content in the aluminum alloy, the vacuum extraction method was selected. Authors have established that treatment of molten aluminum alloy in contact with carbon melt at high temperatures of 2,000–2,100 °C has resulted in facilitating reduction of hydrogen and aluminum oxide content in the melt by 40-43% and 50-58%, respectively, which is important because hydrogen and aluminum oxide adversely affect the structure and properties of the alloy. Such treatment contributes to the formation of the extremely fine-grained microstructure of aluminum alloy.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 61-66
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model wyznaczania maksymalnego dopuszczalnego odchylenia namiaru wsadu do pieców odlewniczych
    Model for Determining Maximum Error of Weighing Materials in the Technological Process of Foundry Furnaces Charge Preparation
    Autorzy:
    Wańczyk, K.
    Ziółkowski, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/382268.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    namiar wsadu
    piec odlewniczy
    optymalizacja liniowa
    optymalizacja kwadratowa
    materiał wsadowy
    burden calculation
    foundry furnace
    linear optimisation
    charge material
    Opis:
    W systemach sterowania przygotowaniem wsadu do pieców odlewniczych wyznaczony, na przykład za pomocą metod optymalizacyjnych, namiar wsadu stanowi informację wejściową dla urządzeń naważających poszczególne materiały wsadowe. Ważenie i dozowanie materiałów wsadowych o zróżnicowanej kawałkowatości, za pomocą różnych urządzeń (na przykład chwytaki elektromagnetyczne, rynny wibracyjne) może być przyczyną nieprawidłowej masy i składu chemicznego zestawianego wsadu. W artykule zaproponowano model matematyczny wyznaczania maksymalnych wartości rozrzutu udziałów poszczególnych materiałów wsadowych, gwarantujących otrzymanie ciekłego metalu o założonym składzie chemicznym.
    The control systems used in the preparation procedure of the batch material for the melting furnaces, i. e. optimization methods, generates data used as input for the weighting devices of individual materials. The input batch materials of varying shapes and sizes are dosed by different devices (e. g. electromagnetic grippers, vibratory conveyors) which could result with incorrect batch weight and chemical composition. The article proposes a mathematical model for the determination of the maximum value of the dispersion shares of the various input materials, which guarantee of obtaining of the liquid metal witch assumed correct chemical composition.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4 spec.; 147-150
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Microwave Heating on Moulding Sand Properties with Gypsum Binder
    Autorzy:
    Paduchowicz, P.
    Stachowicz, M.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382976.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry industry
    foundry materials
    foundry technology
    microwave heating
    gypsum
    binding material
    przemysł odlewniczy
    materiały odlewnicze
    technologia odlewnicza
    ogrzewanie mikrofalowe
    gips
    materiał wiążący
    Opis:
    The paper presents results of initial research on the possibility of applying microwave radiation in an innovative process of making casting moulds from silica sand, where gypsum CaSO4∙2H2O was acting as a binding material. In the research were compared strengths and technological properties of moulding mixture subjected to: natural bonding process at ambient temperature or natural curing with additional microwave drying or heating with the use of microwaves immediately after samples were formed. Used in the research moulding sands, in which dry constituents i.e. sand matrix and gypsum were mixed in the ratio: 89/11. On the basis of the results of strength tests which were obtained by various curing methods, beneficial effect of using microwaves at 2.45 GHz for drying up was observed after 1, 2 and 5 hours since moisture sandmix was formed. Applying the microwaves for hardening just after forming the samples guarantees satisfactory results in the obtained mechanical parameters. In addition, it has been noted that, from a technological and economic point of view, drying the silica sand with gypsum binder in microwave field can be an alternative to traditional molding sand technologies.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 97-102
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The deformation of wax patterns and castings in investment casting technology
    Autorzy:
    Herman, A.
    Česal, M.
    Mikeš, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382400.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    technologia informatyczna
    przemysł odlewniczy
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    odlewanie precyzyjne
    model odlewniczy
    information technology
    foundry industry
    innovative foundry technologies
    innovative foundry material
    investment casting
    wax patterns
    Opis:
    The dimensional accuracy of the final casting of Inconel alloy 738 LC is affected by many aspects. One of them is the choice of method and time of cooling wax model for precision investment casting. The main objective was to study the initial deformation of the complex shape of the casting of the rotor blades. Various approaches have been tested for cooling wax pattern. When wax models are cooling on the air, without clamping in jig for cooling, deviations from the ideal shape of the casting are very noticeable (up to 8 mm) and most are in extreme positions of the model. When blade is cooled in fixing jig in water environment, the resulting deviations compared with cooling in air are significantly larger, sometimes up to 10 mm. This itself does not mean that the final shape of the casting is dimensionally more accurate with usage of wax models, which have deviations from the ideal position smaller. Another deformation occurs when shell mould is produced around wax pattern and furthermore deformations emerge while casting of blade is cooling. This paper demonstrates first steps in describing complex process of deformations of Inconel alloy blades produced with investment casting technology by comparing results from thermal imagery, simulations in foundry simulation software ProCAST 2010 and measurements from CNC scanning system Carl Zeiss MC 850. Conclusions are so far not groundbreaking, but it seems deformations of wax pattern and deformations of castings do in some cases cancel each other by having opposite directions. Describing entirely whole process of deformations will help increase precision of blade castings so that models at the beginning and blades in the end are the same.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 37-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of heat accumulation coefficient for oil bonded moulding sands
    Autorzy:
    Łągiewka, M.
    Konopka, Z.
    Zyska, A.
    Nadolski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379643.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    theoretical basis
    casting processes
    moulding material
    oil binder
    heat accumulation coefficient
    moulding sand
    temperature equalization coefficient
    podstawy teoretyczne
    proces odlewniczy
    materiał formierski
    spoiwo olejowe
    współczynnik akumulacji ciepła
    masa odlewnicza
    Opis:
    The possibility of controlling the solidification and cooling time of castings creates prospects of improving their structure and by the same their properties. Thermal properties of the mould constitute therefore an important factor which is necessary to consider while seeking for the mentioned improvement. The presented work illustrates the method of determining some basic thermal coefficients of moulding material, i.e. the coefficient of temperature equalisation a2, known also as the temperature diffusivity, and the heat accumulation coefficient b2, which characterises the ability of moulding material to draw away the heat from a casting. The method consists in experimental determining the temperature field within the mould during the processes of pouring, solidification and cooling of the casting. The performed measurements allow for convenient and exact calculations of the sought-after coefficients. Examinations were performed for the oil bonded moulding sand of trade name OBB SAND ‘E’. The experiment showed that the obtained value of b2 coefficient differs from the value calculated on the basis of theoretical considerations available in publications. Therefore it can be stated that theoretical calculations of the heat accumulation coefficient are thus far not sufficient and not quite reliable, so that these calculations should be verified experimentally.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Logistics of materials flow in an iron foundry
    Autorzy:
    Kukla, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/379740.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    transport system
    logistics
    material flow
    work ergonomics
    production system
    rationalisation
    technologia informacyjna
    przemysł odlewniczy
    system transportowy
    logistyka
    przepływ materiału
    ergonomia pracy
    system produkcji
    racjonalizacja
    Opis:
    The article presents issues related to creating and realizing added value by logistic processes and processing in a casting enterprise. It discusses possibilities of improving systems of casts production by evaluating labour intensity of casts manufacture and analyzing manufacturing prime costs. Operations with added value, processes indirectly creating added value and operations without added value have been specified. The problem was presented on the example of materials flow design in a foundry, where casts are manufactured in expendable moulds and using automated foundry lines. On the basis of the Pareto analysis, a group of casts was specified whose manufacture significantly influences the functioning of the whole enterprise. Finishing treatment operations have been particularly underlined, as they are performed away from the line and are among the most labour-consuming processes during casts production.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 55-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-65 z 65

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