TY - GEN
T1 - Effect of microstructure on the rolling contact fatigue strength of 4600 steel P/M compacts
AU - Tokuoka, Terukazu
AU - Nakahara, Yoshitomo
AU - Kudo, Kentaro
AU - Nishioka, Takao
AU - Miura, Hideshi
PY - 2010
Y1 - 2010
N2 - Generally, the mechanical properties of conventional P/M materials are inferior to those of wrought materials. Therefore, the improvement of mechanical properties for P/M materials is needed for heavy-duty applications such as automotive transmission gears. Heat-treated 4600 steel MIM compacts with heterogeneous microstructure, which are made possible using mixed elemental powders, showed excellent tensile and bending fatigue strength in our previous studies. This study was performed to clarify the relationship between rolling contact fatigue behavior and the microstructure in 4600 steel P/M compacts using prealloyed and mixed elemental powders. The heterogeneous microstructure using mixed elemental powders showed slightly superior properties compared with the homogeneous microstructure using prealloyed powder. Those compacts were also densified by rolling. Contrary to the prediction, the rolling contact fatigue strength of the rolled sample was on the same level as the non-rolled sample.
AB - Generally, the mechanical properties of conventional P/M materials are inferior to those of wrought materials. Therefore, the improvement of mechanical properties for P/M materials is needed for heavy-duty applications such as automotive transmission gears. Heat-treated 4600 steel MIM compacts with heterogeneous microstructure, which are made possible using mixed elemental powders, showed excellent tensile and bending fatigue strength in our previous studies. This study was performed to clarify the relationship between rolling contact fatigue behavior and the microstructure in 4600 steel P/M compacts using prealloyed and mixed elemental powders. The heterogeneous microstructure using mixed elemental powders showed slightly superior properties compared with the homogeneous microstructure using prealloyed powder. Those compacts were also densified by rolling. Contrary to the prediction, the rolling contact fatigue strength of the rolled sample was on the same level as the non-rolled sample.
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M3 - Conference contribution
AN - SCOPUS:84902174155
SN - 9781899072194
T3 - Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
BT - Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
PB - European Powder Metallurgy Association (EPMA)
T2 - World Powder Metallurgy Congress and Exhibition, World PM 2010
Y2 - 10 October 2010 through 14 October 2010
ER -