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  • Effect of austenitising temperature on austempering kinetics of Ni-Mo alloyed ductile iron = Vpliv temperature avstenitizacije na kinetiko austempering legirane nodularne litine
    Bosnjak, Branka ; Radulović, Branko, 1950-
    The effect of austenitising temperature on the transformation kinetics of Fe-3.2C-2.68Si-0.07Mn-0.022P-0.003S-0.02Cu-0.12Cr-0.8Ni-0.25Mo [mass fractions] ductile iron was investigated. X-ray ... diffraction and optical microscopy were used to determine the transformation kinetics during the austempering at 350 [compositum]C after austenitising at 850 [compositum]C and 930 [compositum]C for 120 min. The stage I reaction of austempering occurs in two steps, first in eutectic cells and than in the intercellular area. Decreasing the austenitising temperature is shown to increase the driving force for the stage I reaction but to have little effect on the stage II reaction. By lower austenitising temperature the rate of transformation is greater, a more uniform microstructure is obtained, while the austemperability is smaller. These changes shift the processing window for Ni-Mo ductile iron for selected austenitising temperature.
    Source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 38, štev. 6, 2004, str. 307-312)
    Type of material - article, component part
    Publish date - 2004
    Language - english
    COBISS.SI-ID - 364714

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    Digitalna knjižnica Slovenije - dLib.si

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