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    Wyświetlanie 1-4 z 4
    Tytuł:
    Researching the Influence of Chemical Composition and Technological Parameters on the Quality of Copper Alloys
    Autorzy:
    Rzadkosz, S.
    Kozana, J.
    Kranc, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379548.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper alloy
    Cu-Zn alloy
    mechanical properties
    alloying additives
    alloy refining
    stop miedzi
    stop Cu-Zn
    właściwości mechaniczne
    dodatki stopowe
    rafinacja stopu
    Opis:
    The work presents the results of process efficiency of refining liquid copper with special refining agents and the analysis results of the influence of alloying components on the structure and properties of the chosen alloys. The research undertaken aimed at evaluation of the influence of alloying additives, such as aluminium, silicon and also cobalt in the chosen Cu-Zn alloys. The microstructures were researched with the help of light and scanning microscopy together with X-ray microanalysis to determine significant changes of mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 153-158
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The spheroidisation of VC carbides in high-vanadium cast iron
    Autorzy:
    Kawalec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380290.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties
    high-vanadium cast iron
    eutectic alloy
    vanadium carbide
    właściwości mechaniczne
    żeliwo wysokowanadowe
    stop eutektyczny
    węglik wanadu
    Opis:
    High-vanadium cast iron is a type of white cast iron, in which a regular fibrous γ + VC eutectic with about 20 vol.% of vanadium carbides crystallises. The paper presents the results of research during which the high-vanadium cast iron was subjected to spheroidisation treatment with magnesium Elmag 5800 master alloy. The purpose of this operation was to obtain the VC carbides of a spheroidal shape. The study also included metallographic examinations and testing of mechanical properties carried out on high-vanadium cast iron of a eutectic composition in as-cast condition and after the spheroidising treatment. The attempt to spheroidise the vanadium carbides has proved to be quite successful. The introduction of magnesium alloy has made nearly one half of the crystallised vanadium carbides acquire a spheroidal shape. The, obtained in this way, high-vanadium cast iron with vanadium carbides of a spheroidal shape showed very high mechanical and plastic properties. The tensile strength Rm increased by 60% compared to the as-cast alloy, while ductility increased more than twenty times. The presented results are based on the initial trials, but further studies of this new material are planned, mainly to check its resistance to abrasion, to impacts and corrosion. Tests are also planned to increase the fraction of spheroidal carbides and measure the effect of their content on the mechanical and tribological properties.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 111-116
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Microstructure of Fe-C-V Alloys on Selected Functional Properties
    Autorzy:
    Kawalec, M.
    Kozana, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382066.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microstructure
    Fe-C-V alloy
    workability
    mechanical properties
    vanadium carbide
    mikrostruktura
    stop Fe-C-V
    urabialność
    właściwości mechaniczne
    węglik wanadu
    Opis:
    The cast alloys crystallizing in Fe-C-V system are classified as white cast iron, because all the carbon is bound in vanadium carbides. High vanadium cast iron has a very high abrasion resistance due to hard VC vanadium carbides. However, as opposed to ordinary white cast iron, this material can be treated using conventional machining tools. This article contains the results of the group of Fe-C-V alloys of various microstructure which are been tested metallographic, mechanical using an INSTRON machine and machinability with the method of drilling. The study shows that controlling the proper chemical composition can influence on the type and shape of the crystallized matrix and vanadium carbides. This makes it possible to obtain a high-vanadium cast iron with very high wear resistance while maintaining a good workability.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 33-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Microstructure, Properties and Machinability of Al-Cu-Si Alloys
    Autorzy:
    Kozana, J.
    Piękoś, M.
    Maj, M.
    Garbacz-Klempka, A.
    Żak, P. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1840820.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting of non-ferrous metals
    aluminum alloys
    ternary Al-Cu-Si alloy
    mechanical properties
    microstructure
    thermo-calc
    odlewanie metali nieżelaznych
    stopy aluminium
    stop trójskładnikowy Al-Cu-Si
    właściwości mechaniczne
    mikrostruktura
    Opis:
    As part of the studies conducted in the field of broadly understood casting of non-ferrous metals, selected results on the impact of variable additions of copper and silicon in aluminium were presented. A series of melts was carried out with copper content kept constant at a level of 2% (1st stage) and 4% (2nd stage) and variable contents of silicon introduced into aluminium. The crystallization characteristics of the examined alloys and the percentage of structural constituents at ambient temperature were obtained by modelling the thermodynamic parameters of individual phases with the CALPHAD method. The microstructure of the obtained alloys was examined and microhardness was measured by the Vickers-Hanemann method. The alloy properties were assessed based on the results of mechanical tests, including ultimate tensile strength (UTS), hardness (BHN) and elongation (E). The machinability of the tested alloys was analyzed in a machinability test carried out by the Keep-Bauer method, which consisted in drilling with a constant feed force. The obtained results clearly indicate changes in the images of microstructure, such as the reduction in grain size, solution hardening and precipitation hardening. The changes in the microstructure are also reflected in the results of mechanical properties testing, causing an increase in strength and hardness, and plasticity variations in the range of 4 ÷ 16%, mainly due to the introduced additions of copper and silicon. The process of alloy strengthening is also visible in the results of machinability tests. The plotted curves showing the depth of the hole as a function of time and the images of chips produced during the test indicate an improvement in the wear resistance obtained for the tested group of aluminium alloys with the additions of copper and silicon.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 145-153
    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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