Title:
転動部材およびその製造方法
Document Type and Number:
Japanese Patent JP4390526
Kind Code:
B2
Abstract:
There is provided an inexpensive rolling element used under high interface pressure such as induction hardened gears, the rolling element being improved in the seizure resistance of its tooth flanks and having a temper hardness of HRC 50 or more at 300° C. To this end, the rolling element is made from a steel material containing at least 0.45 to 1.5 wt % C and one or more alloy elements selected from 0.1 to 0.5 wt % V and 0.3 to 1.5 wt % Cr, and has a rolling contact surface layer having a structure tempered at low temperature in which 2 to 18% by volume cementite disperses in a martensite parent phase formed by induction heating and cooling and containing 0.25 to 0.8 wt % carbon solid-dissolving therein.
Inventors:
Takayama Takemori
Masaya Furumoto
Nakao Riki
Noriko Morioka
Masaya Furumoto
Nakao Riki
Noriko Morioka
Application Number:
JP2003374041A
Publication Date:
December 24, 2009
Filing Date:
November 04, 2003
Export Citation:
Assignee:
KOMATSU LTD.
International Classes:
C22C38/00; F16H55/06; C21D1/06; C21D1/10; C21D1/32; C21D1/78; C21D9/32; C22C38/24; C22C38/50; C23C8/22; C23C8/32; C23C8/80; C21D7/06
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Attorney, Agent or Firm:
Tsutomu Inoue