发明名称 |
Rolling-contact shaft with joint claw |
摘要 |
A steel-made rolling-contact shaft with a joint claw improved in both the rolling contact fatigue life at the raceway and the static fracture strength (torsional strength) at the claw includes a joint claw at one end, and has a portion of the outer cylindrical surface functioning as a raceway of a needle roller qualified as a rolling element of a needle bearing. The joint claw is subjected to tempering by induction heating. A nitrogen-enriched layer is formed at the surface layer of the rolling-contact shaft with a joint claw. The grain size number of austenite grains in the nitrogen-enriched layer exceeds number 10. The hydrogen content of the rolling-contact shaft with a joint claw is not more than 0.5 ppm. |
申请公布号 |
US8066826(B2) |
申请公布日期 |
2011.11.29 |
申请号 |
US20060501816 |
申请日期 |
2006.08.10 |
申请人 |
HASEGAWA HISATAKA;WATANABE YASUYUKI;NTN CORPORATION |
发明人 |
HASEGAWA HISATAKA;WATANABE YASUYUKI |
分类号 |
C23C8/26 |
主分类号 |
C23C8/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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