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    Wyświetlanie 1-13 z 13
    Tytuł:
    Effect of Temperature on Ausferritic Nodular Cast Iron Microstructure
    Autorzy:
    Gumienny, G.
    Klimek, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/379556.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    nodular cast iron
    ausferrite
    annealing
    innowacyjne materiały odlewnicze
    innowacyjne technologie
    żeliwo sferoidalne
    wyżarzanie
    Opis:
    The work presents the results of the studies of the effect of the temperature on the microstructure of ausferritic nodular cast iron. The ausferrite in the matrix was obtained by way of a specific combination of molybdenum and copper. The cast iron underwent annealing at the temperatures of 520, 550 and 580°C. The work presents the effect of the annealing temperature on the fraction of austenite in the cast iron matrix. The annealed and non-annealed cast iron hardness is given. The work also proves that an increase in the temperature up to 580°C causes a drop in the cast iron hardness.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3 spec.; 21-24
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of an Advanced Cellulose Profile Used for the Manufacture of Gating Systems
    Autorzy:
    Zawieja, Z.
    Sawicki, J.
    Gumienny, G.
    Sobczyk-Guzenda, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380939.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting technologies
    innovative casting materials
    cellulose profiles
    gating system
    aluminium silicates
    gray cast iron
    ausferrite
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    glinokrzemiany
    żeliwo szare
    Opis:
    The here in paper contains the results of investigations on a new type of cellulose blend used for the manufacture of profiles applied in the process of making gating systems in the foundry industry. A standard cellulose profile was subjected to an experiment. During the experiment the profile was filled with a liquid cast iron and at the same time the temperatures of the liquid metal crystallizing inside the profile were measured as well as the temperature of the outer layer of the profile was controlled. Further, the microstructure of the cast iron, which crystallized out inside the cellulose profile, was analysed and the cellulose, thermally degraded after the experiment, was verified with the use of the chemical analysis method. Moreover, a quality analysis of the original as well as the degraded cellulose profile was run with the use of the FTIR infrared spectroscopy. The presented results revealed that the cellulose blend is aluminium silicate enriched and contains organic binder additives. The cast iron, which crystallized out, tended to have an equilibrium pearlitic structure with the release of graphite and carbides. The generation of disequilibrium ausferrite phases was also observed in the structure.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 123-128
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Modification and Casting Technology on Structure of IN-713C Superalloy Castings
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Mańka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381572.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    nickel alloy IN-713C
    modification
    cobalt aluminate
    macrostructure
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    stop niklu
    modyfikacja
    kobalt
    makrostruktura
    Opis:
    The paper presents the results concerning impact of modification (volume and surface techniques), pouring temperature and mould temperature on stereological parameters of macrostructure in IN713C castings made using post-production scrap. The ability to adjust the grain size is one of the main issues in the manufacturing of different nickel superalloy castings used in aircraft engines. By increasing the grain size one can increase the mechanical properties, like diffusion creep resistance, in higher temperatures. The fine grained castings. on the other hand, have higher mechanical properties in lower temperatures and higher resistance to thermal fatigue. The test moulds used in this study, supplied by Pratt and Whitney Rzeszow, are ordinarily used to cast the samples for tensile stress testing. Volume modification was carried out using the patented filter containing cobalt aluminate. The macrostructure was described using the number of grains per mm2, mean grain surface area and shape index. Obtained results show strong relationship between the modification technique, pouring temperature and grain size. There was no significant impact of mould temperature on macrostructure.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 11-14
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ATD and DSC Analysis of IN-713C and ZhS6U-VI Superalloys
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/381895.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    Nickel superalloys
    ATD method
    DSC method
    solidification parameters
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    stopy niklu
    metoda ATD
    metoda DSC
    parametry krzepnięcia
    Opis:
    Paper presents the results of ATD and DSC analysis of two superalloys used in casting of aircraft engine parts. The main aim of the research was to obtain the solidification parameters, especially Tsol and Tliq, knowledge of which is important for proper selection of casting and heat treatment parameters. Assessment of the metallurgical quality (presence of impurities) of the feed ingots is also a very important step in production of castings. It was found that some of the feed ingots delivered by the superalloy producers are contaminated by oxides located in shrinkage defects. The ATD analysis allows for quite precise interpretation of first stages of solidification at which solid phases with low values of latent heat of solidification are formed from the liquid. Using DSC analysis it is possible to measure precisely the heat values accompanying the phase changes during cooling and heating which, with knowledge of phase composition, permits to calculate the enthalpy of formation of specific phases like γ or γ′.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 1; 13-16
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the Annealing Temperature on the Microstructure and Properties of Ausferritic Nodular Cast Iron
    Autorzy:
    Gumienny, G.
    Klimek, L.
    Kurowska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/383050.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    ausferritic cast iron
    nodular cast iron
    impact strength
    annealing
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    żeliwo ausferrytyczne
    żeliwo sferoidalne
    siła uderzenia
    wyżarzanie
    Opis:
    The paper presents the microstructure and selected properties of ausferritic nodular cast iron annealed at the temperature 520 and 550°C. This choice was dictated by the temperatures used in the practice of nitriding. Nodular graphite in cast iron was obtained with use of Inmold process. Cast iron containing molybdenum and copper ensuring obtaining an ausferrite in the cast iron matrix without the use of heat treatment of castings was tested. The effect of annealing temperature on the microstructure and the kind of fracture of the ausferritic nodular cast iron was presented. The effect of an annealing temperature on hardness, impact strength and the microhardness of ausferritic nodular cast iron matrix was shown too. The lamellar structure of phases in the cast iron matrix after annealing has been ascertained. There has been an increase in hardness of an annealed cast iron and microhardness of its matrix. The reduction in the impact strength of the cast iron annealed at 520 and 550°C was approximately 10-30%. Both an increase in the hardness of cast iron as well as an decrease in its impact strength is probably due to the separation of secondary carbides during the heat treatment.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 43-48
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Relationship Between the Solidification Parameters and Chemical Composition of Nickel Superalloy IN-713C
    Autorzy:
    Binczyk, F.
    Gradoń, J.
    Cwajna, J.
    Szymszal, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/383245.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    nickel alloy IN-713C
    thermal analysis
    solidification parameters
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    stop niklu IN-713C
    analiza termiczna
    parametry zestalania
    Opis:
    The paper presents the results of studies on the development of correlation of solidification parameters and chemical composition of nickel superalloy IN-713C, which is used i.a. on aircraft engine turbine blades. Previous test results indicate significant differences in solidification parameters of the alloy, especially the temperatures Tliq and Tsol for each batch of ingots supplied by the manufacturer. Knowledge of such a relationship has important practical significance, because of the ability to asses and correct the temperatures of casting and heat treatment of casts on the basis of chemical composition. Using the statistical analysis it was found that the temperature of the solidification beginning Tliq is mostly influenced by the addition of carbon (similar to iron alloys). The additions of Al and Nb have smaller but still significant impact. Other alloying components do not have significant effect on Tliq. The temperature Teut is mostly affected by Ni, Ti and Nb. The temperature Tsol is not in any direct correlation with the chemical composition, which is consistent with previous research. The temperature Tsol depends primarily on the presence of non-metallic inclusions present in feed materials and introduced during the melting and casting processes.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 5-10
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Modified Cores for Grain Refinement in Castings of Aircraft Turbine Blades
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382651.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting materials
    innovative casting technologies
    Nickel alloy IN-713C
    surface modification
    turbine blades
    macrostructure
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    Stop niklu IN-713C
    modyfikacja powierzchni
    łopatki turbinowe
    makrostruktura
    Opis:
    Paper presents the results of research on modified surface grain refinement method used in investment casting of hollow, thin-walled parts made of nickel based superalloys. In the current technology, the refining inoculant is applied to the surface of the wax pattern and then, it is transferred to the ceramic mould surface during dewaxing. Because of its chemical activity the inoculant may react with the liquid metal which can cause defects on the external surface of the cast part. The method proposed in the paper aims to reduce the risk of external surface defects by applying the grain refiner only to the ceramic core which shapes the internal surface of the hollow casting. In case of thin-walled parts the grain refinement effect is visible throughout the thickness of the walls. The method is meant to be used when internal surface finish is less important, like for example, aircraft engine turbine blades, where the hollowing of the cast is mainly used to lower the weight and aid in cooling during operation.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 19-22
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    3DP Technology for the Manufacture of Molds for Pressure Casting
    Autorzy:
    Skorulski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/383141.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative materials
    innovative casting technologies
    rapid prototyping
    ceramic mold
    pressure casting
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    prototypy
    formy ceramiczne
    odlewanie ciśnieniowe
    Opis:
    The paper presents the use of rapid prototyping technology of three dimensional printing (3DP) to make a prototype shell casting mold. In the first step, for identification purposes, a mold was prepared to enable different alloys to be cast. All molds being cast were designed in a universal CAD environment and printed with the zp151 composite material (Calcium sulfate hemihydrate) with a zb63 binder (2-pyrrolidone). It is designated to be used to prepare colourful models presenting prototypes or casting models and molds. The usefulness of 3DP technology for use with copper alloys, aluminum and zinc was analyzed. The strength of the mold during casting was assumed as a characteristic comparative feature in the material resistance to high temperature, the quality of the resulting casting and its surface roughness. Casting tests were carried out in vacuum – pressure casting. The casting programs applied, significantly increased the quality of castings and enabled precise mold submergence. Significant improvement was noted in the quality compared to the same castings obtained by gravity casting.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 99-102
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Feeding and Cooling and Time of Thermal Treatment of a Massive Bush Made of the Complex Aluminum Bronze Cast by the Lost Foam
    Autorzy:
    Just, P.
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380931.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative materials
    innovative casting technologies
    lost foam
    aluminium bronze
    casting properties
    riser head
    steel internal chill
    thermal treatment
    nowoczesne materiały
    innowacyjne technologie odlewnicze
    właściwości odlewów
    obróbka termiczna
    Opis:
    Small additions of Cr, Mo and W to aluminium-iron-nickel bronze are mostly located in phases &kappa i (i=II; III; IV),and next in phase &alpha (in the matrix) and phase γ2. They raise the temperature of the phase transformations in aluminium bronzes as well as the casts’ abrasive and adhesive wear resistance. The paper presents a selection of feeding elements and thermal treatment times which guarantees structure stability, for a cast of a massive bush working at an elevated temperature (650–750°C) made by means of the lost foam technology out of composite aluminium bronze. So far, there have been no analyses of the phenomena characteristic to the examined bronze which accompany the process of its solidification during gasification of the EPS pattern. There are also no guidelines for designing risers and steel internal chill for casts made of this bronze. The work identifies the type and location of the existing defects in the mould’s cast. It also proposes a solution to the manner of its feeding and cooling which compensates the significant volume contraction of bronze and effectively removes the formed gases from the area of mould solidification. Another important aspect of the performed research was establishing the duration time of bronze annealing at the temperature of 750°C which guarantees stabilization of the changes in the bronze microstructure – stabilization of the changes in the bronze HB hardness.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 39-44
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Method and Apparatus for Assessing the Properties of Slags
    Autorzy:
    Biernat, S.
    Bydałek, A. W.
    Wołczyński, W.
    Holtzer, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381284.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environmental protection
    innovative materials
    innovative casting technologies
    laboratory station
    slags
    ochrona środowiska
    innowacyjne materiały odlewnicze
    technologie innowacyjne
    stanowisko laboratoryjne
    żużle
    Opis:
    A special Slag-Prop Cu database has been developed to archive data from laboratory and industrial tests related to post-reduction slags. In order to enrich the data areas, it was decided to design a system for measuring the temperature of the liquid slag and its viscosity. Objectives of research work are to gather information on the properties of post-slags such as the temperature of liquid slag and its viscosity. The discussed issues are especially important in the foundry practice. Designed research stand and using of database applications can greatly facilitate the work of metallurgists, foundrymen, technologists and scientists. The viscosity measurement was developed and presented earlier. The author's analytical methodology was supplemented by a thyristor measuring system (described in the article). The system temperature measurement can be performed simultaneously in 3 ways to reduce the measurement error. Measurement of the voltage mV - using the Seebeck effect can be measured throughout the entire range of thermocouple resistance, up to 1300 °C. Direct temperature measurement ⁰C - measurement only below 1000 ⁰C. Additional measurement - the measurement can also be read from the pyrometer set above the bath. The temperature and the reading frequency depend on the device itself. The principle of measurement is that in a molten metal / slag crucible, we put a N-type thermocouple. The thermocouples are hung by means of a tripod above the crucible and placed in a crucible. The thermocouple is connected to a compensating line dedicated to this type of thermocouple. The cable is in turn connected to a special multimeter that has the ability to connect to a computer and upload results. Temperature measurement can be performed simultaneously in 3 ways to reduce the measurement error. The Sn-Pb alloy has been subjected to testing for proper operation of the device. In this foot should be observed the supercooling of the liquid, which initiates the crystallization process and in which latent heat begins to exude raising the temperature until the coagulation temperature is reached.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 13-18
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Alloy Additions on the Structure and Mechanical Properties of the AlSi7Mg0.3 Alloy
    Autorzy:
    Pisarek, B. P.
    Rapiejko, C.
    Szymczak, T.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380373.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne technologie odlewnicze
    materiały odlewnicze
    odlew precyzyjny
    stopy aluminium
    dodatki stopowe
    SDAS
    indeks jakości
    innovative casting technologies
    innovative materials
    precision investment casting
    aluminium alloys
    alloy additions
    quality index
    Opis:
    The study presents the results of the investigations of the effect of Cu, Ni, Cr, V, Mo and W alloy additions on the microstructure and mechanical properties of the AlSi7Mg0.3 alloy. The examinations were performed within a project the aim of which is to elaborate an experimental and industrial technology of producing elements of machines and devices complex in their construction, made of aluminium alloys by the method of precision investment casting. It was demonstrated that a proper combination of alloy additions causes the crystallization of complex intermetallic phases in the silumin, shortens the SDAS and improves the strength properties: Rm, Rp0.2,HB hardness. Elevating these properties reduces At, which, in consequence, lowers the quality index Q of the alloy of the obtained casts. Experimental casts were made in ceramic moulds preliminarily heated to 160 °C, into which the AlSi7Mg0.3 alloy with the additions was cast, followed by its cooling at ambient temperature. With the purpose of increasing the value of the quality index Q, it is recommended that the process of alloy cooling in the ceramic mould be intensified and/or a thermal treatment of the casts be performed (ageing) (T6).
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 1; 137-142
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of Binding Kinetics and Choice of Self-Hardening Moulding and Core Sands Used for Casting Massive Parts for Wind Power Industry under the Conditions of Krakodlew Foundry
    Autorzy:
    Rączka, M.
    Isendorf, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/382470.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wind energy
    innovative materials
    innovative casting technologies
    environmental protection
    ductile iron
    moulding sand
    energia wiatrowa
    innowacyjne materiały
    innowacyjna technologia odlewania
    ochrona środowiska
    żeliwo
    masy formierskie
    Opis:
    In highly developed countries, a significant progress in the use of alternative and clean energy sources has recently been observed. The European Union has implemented a programme to build wind turbines. It is estimated that in the coming years, thanks to the support in tax and credit, the global energy will develop very intensively. Many components of the wind turbines are castings. The basic material used for these castings is ductile iron, which in this particular case must meet high requirements imposed by the operating conditions of wind turbines. Anticipating an increase in customer demand for this type of castings, Krakodlew SA has decided to modernize its foundry using the ability to obtain external financing. The ductile iron manufacturing technology is now being developed and adapted to the specific conditions of the foundry plant, including the melting process yielding cast material with the required chemical composition, the technology of moulding, and the conditions for possible secondary metallurgy, spheroidizing treatment and graphitizing inoculation. The fulfilment of the imposed conditions for the casting production demands the use of advanced casting technologies introduced to the manufacturing process. The development of technology to launch the production of ductile iron castings for the wind power industry was supported by The National Centre for Research and Development (NCBiR). This article presents part of research on the binding kinetics of furan resin sands and choice of their composition for moulds and cores to make heavy castings used as components of equipment for the wind power industry.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 222-226
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selection of materials and development of technology for the production of elements used in conditions of extreme tribological wear
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Pirowski, Z.
    Grudzień-Rakoczy, M.
    Bitka, A.
    Chrzan, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079807.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting technologies
    wear
    selection of materials
    conditions of extreme
    shell mold
    innowacyjne technologie odlewnicze
    zużycie tribologiczne
    dobór materiałów
    warunki ekstremalne
    Opis:
    Work was done as a part of the project " New generation haulage system of highly productive longwall systems" aiming to develop and implement a new longwall shearer system called KOMTRACK. The widely used EICOTRACK feed system developed forty years ago is not adapted to modern longwall shearers' power. Within the project, an innovative, flexible feed system with a modular structure was created with the possibility of continuous adjustment to the carbon wall's unevenness. Newly-developed three cast steels variants have been initially selected to fabricate this system's elements. The material's final selection was realized based on the tensile tests, Charpy impact tests, Brinell hardness surveys, and wear resistance measurements. Results analysis allowed to select cast steel marked as "2", which fulfilled all requirements and was used in further casting trials.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 47-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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