发明名称 |
Variator disc and a method of fabricating the same |
摘要 |
A blank for disc is heat treated for adjusting a surface hardness thereof to not less than Hv700. The blank has a spline hole thereof heated by high frequency heating while cooling a race thereof. Subsequently, the spline hole is subjected to slow cooling. Thus is obtained a disc having a surface hardness of not less than Hv700 at the race, and a surface hardness of not more than Hv600 at the spline hole, the disc wherein at least a thin portion is varied in hardness between a hardened layer of a bottom of the spline hole and a hardened layer of the race by an amount of not less than Hv20 per 1-mm depth.
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申请公布号 |
US2004048717(A1) |
申请公布日期 |
2004.03.11 |
申请号 |
US20030659313 |
申请日期 |
2003.09.11 |
申请人 |
GOTO MASAO;YAMASHITA KIICHIRO;YASUHARA SHINJI |
发明人 |
GOTO MASAO;YAMASHITA KIICHIRO;YASUHARA SHINJI |
分类号 |
C21D9/40;F16H15/38;(IPC1-7):F16H15/38 |
主分类号 |
C21D9/40 |
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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