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    Wyświetlanie 1-3 z 3
    Tytuł:
    Influence of Heat Treatments and Ni Content on Properties of Martensitic Stainless Steel
    Autorzy:
    Čamek, L.
    Kaňa, V.
    Záděra, A.
    Myška, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381293.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stainless steel
    nickel equivalent
    mechanical properties
    ferrite volume
    stal nierdzewna
    ekwiwalent niklowy
    właściwości mechaniczne
    objętość ferrytu
    Opis:
    The article deals with the influence of chemical composition of martensitic stainless steel for castings GXCrNi13-4 (the 1.4317 material) on mechanical properties and structure of as cast steel after heat treatment. Properties of these martensitic stainless steel are heavily influenced by chemical composition and structure of the material after heat treatment. Structure of these steels after quenching is formed with martensite and residual austenite. When tempering the steel the carbon content in martensite is reduced and gently deposited carbides occur. The way of heat treatment has a major impact on structure of martensitic steels with low carbon content and thus on strength, hardness and elongation to fracture of these steels. Chemical composition of the melt has been treated to the desired composition of the lower, middle and upper bounds of the nickel content in the steel within the limits allowed by the standard. Test blocks were gradually cast from the melt. The influence of the nickel equivalent value on structure and properties of the 1.4317 steel was determined from results of mechanical tests.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 220-225
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some Possibilities of Using Statistical Methods While Solving Poor Quality Production
    Autorzy:
    Lakomá, R.
    Čamek, L.
    Lichý, P.
    Kroupová, I.
    Radkovský, F.
    Obzina, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837848.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    production process
    investment casting
    poor quality products
    casting defects
    quality of cast
    statistical hypothesis
    wax patterns
    proces produkcji
    produkty odlewnicze
    wady odlewów
    jakość odlewu
    metody statystyczne
    formy woskowe
    Opis:
    This paper presents an overview of a research on six practical cases that were solved in a precise casting company where parts are cast by the mean of the low-wax casting method (investment casting) in order to decrease poor quality production. The steel cast parts production technology by the lost-wax method requires the detailed work procedures observation. On the base of statistical processing data of given types of casting products, it was possible to assess the significance of each particular checking events by using the statistical hypothesis testing. The attention was focused on wax and ceramic departments. The data in technological flow were compared before and after the implementation of the change and statistical confirmative influences were assessed. The target consisted in setting such control manners in order to get the right conditions for decreasing poor quality parts. It was evidenced that the cast part defect cause correct identification and interpretation is important.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 18-22
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some Possibilities of Using Statistical Methods While Solving Poor Quality Production
    Autorzy:
    Lakomá, R.
    Čamek, L.
    Lichý, P.
    Kroupová, I.
    Radkovský, F.
    Obzina, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837805.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    production process
    investment casting
    poor quality products
    casting defects
    quality of cast
    statistical hypothesis
    wax patterns
    proces produkcji
    produkty odlewnicze
    wady odlewów
    jakość odlewu
    metody statystyczne
    formy woskowe
    Opis:
    This paper presents an overview of a research on six practical cases that were solved in a precise casting company where parts are cast by the mean of the low-wax casting method (investment casting) in order to decrease poor quality production. The steel cast parts production technology by the lost-wax method requires the detailed work procedures observation. On the base of statistical processing data of given types of casting products, it was possible to assess the significance of each particular checking events by using the statistical hypothesis testing. The attention was focused on wax and ceramic departments. The data in technological flow were compared before and after the implementation of the change and statistical confirmative influences were assessed. The target consisted in setting such control manners in order to get the right conditions for decreasing poor quality parts. It was evidenced that the cast part defect cause correct identification and interpretation is important.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 18-22
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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