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    Wyświetlanie 1-11 z 11
    Tytuł:
    The Effect of Aluminium on Graphitization of Cast Iron Treated with Cerium Mixture
    Autorzy:
    Soiński, M. S.
    Jakubus, A.
    Kordas, P.
    Skurka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380446.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast iron
    aluminium
    graphitization
    cerium mixture
    żeliwo
    grafityzacja
    cer
    Opis:
    The work determined the influence of aluminium in the amount from about 0.6% to about 8% on graphitization of cast iron with relatively high silicon content (3.4%-3.9%) and low manganese content (about 0.1%). The cast iron was spheroidized with cerium mixture and graphitized with ferrosilicon. It was found that the degree of graphitization increases with an increase in aluminium content in cast iron up to 2.8%, then decreases. Nodular and vermicular graphite precipitates were found after the applied treatment in cast iron containing aluminium in the amount from about 1.9% to about 8%. The Fe3AlCx carbides, increasing brittleness and deteriorating the machinability of cast iron, were not found in cast iron containing up to about 6.8% Al. These carbides were revealed only in cast iron containing about 8% Al.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 95-100
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opening Material as the Possibility of Elimination Veining in Foundries
    Autorzy:
    Hrubovčáková, M.
    Vaskova, I.
    Benkova, M.
    Conev, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382635.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    molding mixture
    cold -box - amine
    casting defect
    opening material
    veining
    Opis:
    The main bulk density representation in the molding material is opening material, refractory granular material with a particle size of 0.02 mm. It forms a shell molds and cores, and therefore in addition to activating the surface of the grain is one of the most important features angularity and particle size of grains. These last two features specify the porosity and therefore the permeability of the mixture, and thermal dilatation of tension from braking dilation, the thermal conductivity of the mixture and even largely affect the strength of molds and cores, and thus the surface quality of castings. Today foundries, which use the cast iron for produce of casts, are struggling with surface defects on the casts. One of these defects are veining. They can be eliminated in several ways. Veining are foundry defects, which arise as a result of tensions generated at the interface of the mold and metal. This tension also arises due to abrupt thermal expansion of silica sand and is therefore in the development of veining on the surface of casts deal primarily influences and characteristics of the filler material – opening material in the production of iron castings.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 157-161
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ecological Binding Material of First Generation
    Autorzy:
    Vasková, I.
    Hrubovčáková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379910.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bentonite
    moulding mixture
    nitrification
    quality bentonite
    ecological aspect
    bentonit
    jakość
    aspekt ekologiczny
    Opis:
    Bentonite is clay rock, which is created by decomposition of vulcanic glass. It is formed from mixture of clay minerals of smectite group, mainly montmorillonite, beidellite and nontronite. Its typical characteristics is, that when in contact with water, it intensively swells. First who used this term was W.C. Knight in 1887. The rock had been named after town Fort Benton in American state Montana. For its interesting technological properties and whiteness has wide technological use. Bentonite is selectively mined and according to its final use separately modified, which results in high quality product with specific parameters. In the beginning of 21st century belong bentonite moulding mixtures in foundry to always perspective. Mainly increased ratio of ductile cast iron castings production cannot be ensured without the need of quality bentonite. Great area of scope remains to further research of moulding materials, which return also to bentonite producers.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 123-128
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The dependence of castings quality produced in clay moulding mixtures from the properties of binder based on a montmorillonite
    Autorzy:
    Vasková, I.
    Fecko, D.
    Malik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380359.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    jakość odlewu
    masa formierska
    bentonit
    montmorillonit
    casting quality
    clay moulding mixture
    bentonite
    montmorillonite
    Opis:
    Casting quality depends on many factors including the quality of the input materials, technology, material securing and last but not least, the mould into which the casting is casted. By pouring into a single-shot mould, based mainly on 1st generation binders, is is a very important factor. Basically, a bentonite mixture represents either a three- or four-component system, but each component of the system is a heterogeneous substance. This heterogeneity punctuates mainly a non-stationary heat field, presented throughout the whole process of the casting production. The most important component is a binder and in the case of first generation binders mostly bentonites are used - clays that contain minimum of 80% of montmorillonite.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 123-128
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Burrs from Cores Produced by Cold-Box- Amine Method and Possibility of their Elimination in Eurocast Košice s.r.o. Company
    Autorzy:
    Vaskova, I.
    Hrubovcakova, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379498.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry industry
    moulding mixture
    cold -box - amine
    casting error
    flash gutters
    przemysł odlewniczy
    wady stopów
    Opis:
    Foundry industry belongs toward key branch with important meaning for different manufacturing industries. Liquid metal is casting in foundry, which makes cast stock with weight from several grams till several ton [1]. To achieve asking qualities of the product is needed know abundance technological a technical process and progress, but in spite of long – term development foundry industry there occur some question marks, that need answer. Characteristic defect castings of ferrous alloys, which often accompanies the use of amine - Cold box cores are flash gutters. Survey, it was found that 77 % of those surveyed foundries have problems with burrs, 71 % foundries solves this problem (or try to tackle) protivýronkovými ingredients in nuclear and molding compounds , but only 29 % considered their "antivýronkovú" method for successful and favorable.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 115-120
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ temperatury na kinetykę utwardzania wybranych mas ze spoiwami
    The influence of temperature on the kinetics of the hardening selected molding sands with binders
    Autorzy:
    Jamrozowicz, Ł.
    Zych, J.
    Kozień, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381999.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    masa samoutwardzalna
    wpływ temperatury
    kinetyka utwardzania
    technika ultradźwiękowa
    selfhardening mixture
    temperature influence
    hardening kinetics
    ultrasonic technique
    Opis:
    W artykule zaprezentowano wyniki badań wpływu temperatury osnowy na przebieg procesu wiązania mas samoutwardzalnych. Badaniom poddano 3 masy na bazie: żywicy alkidowej, żywicy fenolowej typu rezolowego (proces α-set) i żywicy furfurylowej (proces furanowy). Ponadto wyznaczono kinetykę procesu utwardzania i określono żywotność masy przy różnych temperaturach osnowy (10 ºC; 20 ºC; 30 ºC). Badania prowadzono przy wykorzystaniu techniki ultradźwiękowej.
    In the article the author presents the results of the researches into the sand grains temperature's influence on the process course of bonding the hardening self-setting sand. There are three different self-setting sand which undergo in the researches on the basis of: an alkyd resin, a phenol resin a-stage type (alfa-set process) and a furfuryl resin (furane process). What is more, the kinetics of the hardening process is defined and the self-setting sand vitality is described in the different sand grains temperatures (10 ºC; 20 ºC; 30 ºC). The researchers are taken with the use of the ultrasonic technique.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 75-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production of castings by patternless process
    Autorzy:
    Pastirčák, R.
    Urgela, D.
    Krivoš, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/382455.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    forma odlewnicza
    obróbka CNC
    masa formierska
    odlew prototypowy
    patternless process
    mould
    CNC machining
    moulding mixture
    prototype casting
    Opis:
    This paper deals with production of safety inlay for steam locomotive valve by the Patternless Process method. For the moulds creation was used moulding mixtures of II. generation, whereas binder was used a water glass. CNC miller was used for creation of mould cavity. Core was created also by milling into block made of moulding compound. In this article will be presented also making of 3D model, setting of milling tool paths and parameters for milling.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 87-92
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of Bentonites and Bentonite Mixtures used in Casting Processes
    Autorzy:
    Paź, S.
    Drożyński, D.
    Górny, M.
    Cukrowicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/379839.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting processes
    bentonite
    properties of bentonites
    bentonite mixture
    green sands
    procesy odlewnicze
    bentonit
    właściwości bentonitów
    mieszanki bentonitowe
    Opis:
    In this work, an assessment and comparison of the quality of selected bentonites and bentonite mixtures was made. The samples consisted of available foundry materials used for bonding green sands. Determining the homogeneity degree and specific surface area of the grains allowed us to compare the examined materials and determine their influence on other parameters. On the basis of a thermal analysis of the bentonites or bentonite mixtures, the changes occurring in the sample during its heating were determined. Determining the potential for ion exchange and montmorillonite content enabled us to assess the binding properties of the materials. The preparation of six green sands with different bentonites or bentonite mixtures gave us the opportunity to assess the changes in apparent density, permeability, compressive strength and friability as a function of humidity, and the impact of different materials on the mentioned parameters. Their charts were analyzed, and the molding sand with the addition of bentonite or a bentonite mixture was selected for which these parameters are favorable. On this basis, the best-presented binding material was assessed and selected.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 35-40
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Component Proportions in Casting Process on Hardness and the Quality of Cast Iron
    Autorzy:
    Saikaew, Charnnarong
    Harnsopa, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/27314151.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    sand casting
    cast hardness
    scrap
    mixture-design
    Monte Carlo simulation
    odlew
    twardość odlewu
    złom
    zawartość składników
    symulacja Monte Carlo
    Opis:
    The purposes of this study were to investigate the impact of proportions of cast iron scrap, steel scrap, carbon and ferro silicon on hardness and the quality of cast iron and to obtain an appropriate proportion of the four components in iron casting process using a mixture experimental design, analysis of variance and response surface methodology coupled with desirability function. Monte Carlo simulation was used to demonstrate the impacts of different proportions of the four components by varying the proportions of components within ±5% of the four components. Microstructures of the cast iron sample obtained from a company and the cast iron samples casted with the appropriate proportions of the four components were examined to see the differences of size and spacing of pearlite particle. The results showed that linear mixture components were statistically significant implying a high proportion of total variability for hardness of the cast iron samples explained by the casting mixtures of raw materials. The graphite of the sample casted from the appropriate proportion has shorter length and more uniform distribution than that from the company. When varying percentages of the four components within ±5% of the appropriate proportion, simulated hardness values were in the range of 237 to 256 HB.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 2; 35--42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern cored wire injection 2PE-9 method in the production of ductile iron
    Autorzy:
    Guzik, E.
    Wierzchowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382516.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    drut proszkowy
    żeliwo sferoidalne
    właściwości mechaniczne
    odzysk magnezu
    drum ladle
    cored wire injection method
    ductile iron
    Fesi + Mg nodulariser mixture
    inoculant master alloy
    mechanical properties
    magnesium recovery
    vertical ladle
    Opis:
    The results of studies on the use of modern two cored wires injection method for production of nodular graphite cast iron with use of unique implementation of drum ladle as a treatment/transport and casting ladle instead vertical treatment ladle was described. The injection of length of [...] 9mm wires, cored: in FeSi + Mg nodulariser mixture and inoculant master alloy is a treatment method which can be used to produce iron melted in coreless induction furnace. This paper describes the results of using this method for possibility production of ductile iron under specific industrial conditions. In this case was taken ductile iron with material designation: EN-GJS-450-10 Grade according PN-EN 1563:2000. Microstructure of 28 trials was controlled on internally used sample which has been correlated with standard sample before. The paper presents typical metallic matrix and graphite characteristic. Additionally, mechanical properties were checked in one experiment. Because of further possibility treatment temperature reduction only the rough magnesium recovery and cost of this new method are given.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 25-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using cored wires injection 2PE-9 method in the production of ferritic Si-Mo ductile iron castings
    Autorzy:
    Guzik, E.
    Wierzchowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380316.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    drut proszkowy
    żeliwo sferoidalne
    zaprawa modyfikująca
    właściwości mechaniczne
    odzysk magnezu
    drum ladle
    cored wires injection 2PE-9 method
    Si-Mo ductile iron
    Fesi + Mg nodulariser mixture
    inoculant master alloy
    ferritic matrix
    mechanical properties
    magnesium recovery
    vertical ladle
    Opis:
    The results of studies on the use of modern two cored wires injection method for production of ferritic nodular cast iron (ductile iron) with use of unique implementation of drum ladle as a treatment / transport and casting ladle instead vertical treatment ladle was described. The injection of length of [...] 9mm wires, cored: in FeSi + Mg nodulariser mixture and inoculant master alloy is a treatment method which can be used to produce iron melted in coreless induction furnace. This paper describes the results and analysis of using this method for optimal production of ductile iron under specific industrial conditions. It means, that length of nodulariser wire plus treatment and pouring temperatures were optimized. In this case, was taken ductile iron with material designation: EN-GJS-SiMo40-6 Grade according EN 16124:2010 E. Microstructure of great number of trials was controlled on internally used sample which has been correlated with standard sample before. The paper presents typical ferritic metallic matrix and nodular graphite. Additionally, mechanical properties were checked in some experiments. Mean values of magnesium recovery and cost of this new method from optimized process parameters were calculated as well.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 4; 53-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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