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    Wyświetlanie 1-5 z 5
    Tytuł:
    Searching for Better Properties of ADI
    Autorzy:
    Krzyńska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382611.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austempered ductile iron
    structure
    properties
    żeliwo sferoidalne
    struktura stopu
    właściwości stopu
    Opis:
    The results of study of austempered ductile iron using different methods of austempering are presented. Except changing time, temperature of austenitizing and isothermal quenching, direct quenching, two-step quenching followed solution heat treatment (austenitizing) was proposed. The goal of this paper is to discuss the results obtained for ductile cast iron subjected two step austempering. Ultimate tensile strength, elongation, hardness, and fracture toughness, thermal stability were compared. Two-step quenching method of hardening seems to be promising.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 91-96
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Austenitization of FerriticDuctile Iron
    Autorzy:
    Krzyńska, A.
    Kochański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/379464.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austenitization
    ductile iron
    ferritic matrix
    matrix structure
    ADI
    austenityzacja
    żeliwo sferoidalne
    Opis:
    Austenitization is the first step of heat treatment preceding the isothermal quenching of ductile iron in austempered ductile iron (ADI) manufacturing. Usually, the starting material for the ADI production is ductile iron with more convenient pearlitic matrix. In this paper we present the results of research concerning the austenitizing of ductile iron with ferritic matrix, where all carbon dissolved in austenite must come from graphite nodules. The scope of research included carrying out the process of austenitization at 900oC using a variable times ranging from 5 to 240 minutes,and then observations of the microstructure of the samples after different austenitizing times. These were supplemented with micro-hardness testing. The research showed that the process of saturating austenite with carbon is limited by the rate of dissolution of carbon from nodular graphite precipitates.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 49-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Austempered Ductile Iron and Manganese Steel Wearability
    Autorzy:
    Kochański, A.
    Krzyńska, A.
    Chmielewski, T.
    Stoliński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382897.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austempered ductile iron
    manganese steel
    wear resistance
    hardness
    żeliwo sferoidalne
    stal manganowa
    odporność na ścieranie
    twardość
    Opis:
    The results of comparison of the wear resistance of manganese steel X120Mn12, S235IR steel and austempered ductile iron ADI are presented. The aim of this study is to determine the possibility of replacing an item made of X120Mn12 steel with another material. For this purpose, all of the samples were measured for Brinell hardness. The samples were then tested for wear resistance in a specially designed test stand. The test resided in shot penning the surface of the test samples within the shot stream with the defined parameters. The test stand used in the test ensured the shot penning parameter stability. The test samples underwent multiple tests in which shot penning occurred in reccurrent cycles. Three test limits were established for the present study: 60, 120 and 180 cycles. The wear resistance measure in this study was the decrease in the tested sample’s weight expressed in grams and calculated for a unit of the shot-penned surface. The obtained results confirmed the possibility of using ADI as a possible replacement of manganese steels in specific cases. Of the eight types of the samples tested, the two ADI samples exhibited abrasion resistance which was comparable to that of the reference sample, while one exhibited better resistance. What constitutes the optimal chemical composition and the corresponding optimal heat treatment for particular cases remains an issue for further research.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 51-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Highsilicone Austempered Ductile Iron
    Autorzy:
    Kochański, A.
    Krzyńska, A.
    Radziszewski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382613.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austempered ductile iron
    silicone content
    matrix structure
    ultimate tensile strength
    żeliwo sferoidalne
    właściwości mechaniczne
    wytrzymałość na rozciąganie
    Opis:
    Ductile iron casts with a higher silicone content were produced. The austempering process of high silicone ductile iron involving different austempering times was studied and the results presented. The results of metallographical observations and tensile strength tests were offered. The obtained results point to the fact that the silicone content which is considered as acceptable in the literature may in fact be exceeded. The issue is viewed as requiring further research.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 55-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties and Structure of High-Silicone Austempered Ductile Iron
    Autorzy:
    Krzyńska, A.
    Kochański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382175.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austempered ductile iron
    silicone content
    matrix structure
    mechanical properties
    ultimate tensile strength
    żeliwo sferoidalne
    zawartość krzemu
    właściwości mechaniczne
    wytrzymałość na rozciąganie
    Opis:
    The results presented in this paper are a continuation of the previously published studies. The results of hest treatment of ductile iron with content 3,66% Si and 3,80% Si were produced. The experimental castings were subjected to austempering process for time 30, 60 and 90 minutes at temperature 300oC. The mechanical properties of heat treated specimens were studied using tensile testing and hardness measurement, while microstructures were evaluated with conventional metallographic observations. It was again stated that austempering of high silicone ferritic matrix ductile iron allowed producing ADI-type cast iron with mechanical properties comparable with standard ADI.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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