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    Wyświetlanie 1-4 z 4
    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:
    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:
    Effect of Cr and W on the Crystallization Process, the Microstructure and Properties of Hypoeutectic Silumin to Pressure Die Casting
    Autorzy:
    Szymczak, T.
    Gumienny, G.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381777.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    theory of crystallization
    innovative foundry
    innovative foundry materials
    pressure die casting
    multicomponent silumin
    DTA method
    teoria krystalizacji
    innowacyjna odlewnia
    innowacyjne materiały odlewnicze
    odlewnictwo ciśnieniowe
    siluminy
    metoda DTA
    Opis:
    This article presents the results of studies in the hypoeutectic silumin destined for pressure die casting with the simultaneous addition of chromium and tungsten. The study involved the derivative and thermal analysis of the crystallization process, metallographic analysis and mechanical properties testing. Silumin 226 grade was destined for studies. It is a typical silumin to pressure die casting. AlCr15 and AlW8 preliminary alloys were added to silumin. Its quantity allowed to obtain 0.1, 0.2, 0.3 and 0.4% of Cr and W in the tested alloy. Studies of the crystallization process as well as the microstructure of the silumin poured into DTA sampler allowed to state the presence of additional phase containing 0.2% or more Cr and W. It has not occurred in silumin without the addition of above mentioned elements. It is probably the intermetallic phase containing Cr and W. DTA studies have shown this phase crystallizes at a higher temperature range than α (Al) solid solution. In the microstructure of each pressure die casting containing Cr and W the new phases formed. Mechanical properties tests have shown Cr and W additives in silumin in an appropriate amount may increase its tensile strength Rm (about 11%), the yield strength Rp0.2 (about 21%) and to a small extent elongation A.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 109-114
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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