TY - GEN
T1 - Rolling contact fatigue property of sintered and carburized compacts made of molybdenum hybrid-alloyed steel powder
AU - Unami, Shigeru
AU - Ozaki, Yukiko
AU - Uenosono, Satoshi
PY - 2007
Y1 - 2007
N2 - A new molybdenum hybrid-alloyed steel powder has been developed. The powder is based on a molybdenum prealloyed steel powder to which molybdenum powder particles have been diffusion bonded. The sintered compact made of the developed powder has a finer pore structure than that of the conventional molybdenum prealloyed steel powder, because the ferritic iron phase (α-phase) with a high diffusion coefficient is formed in the sintering necks where molybdenum is concentrated resulting in enhanced sintering. The rolling contact fatigue strength of the sintered and carburized compacts made of this powder improved by a factor of 3.6 compared with that of the conventional molybdenum prealloyed steel powder. The improvement in the rolling contact fatigue strength should result from the fine pore structure without coarse pores acting as stress concentration points.
AB - A new molybdenum hybrid-alloyed steel powder has been developed. The powder is based on a molybdenum prealloyed steel powder to which molybdenum powder particles have been diffusion bonded. The sintered compact made of the developed powder has a finer pore structure than that of the conventional molybdenum prealloyed steel powder, because the ferritic iron phase (α-phase) with a high diffusion coefficient is formed in the sintering necks where molybdenum is concentrated resulting in enhanced sintering. The rolling contact fatigue strength of the sintered and carburized compacts made of this powder improved by a factor of 3.6 compared with that of the conventional molybdenum prealloyed steel powder. The improvement in the rolling contact fatigue strength should result from the fine pore structure without coarse pores acting as stress concentration points.
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M3 - Conference contribution
AN - SCOPUS:38349121377
SN - 0878494197
SN - 9780878494194
VL - 534-536
T3 - Materials Science Forum
SP - 713
EP - 716
BT - Progress in Powder Metallurgy - Proceedings of the 2006 Powder Metallurgy World Congress and Exhibition (PM 2006)
T2 - 2006 Powder Metallurgy World Congress and Exhibition, PM 2006
Y2 - 24 September 2006 through 28 September 2006
ER -