发明名称 |
HIGH FREQUENCY TEMPERING METHOD |
摘要 |
<p>PURPOSE:To prevent the development of uneven heating temp. caused by difference of heat capacity in quench-hardening layer and to obtain uniform tempering hardness by executing low temp. tempering treatment with high frequency after preheating a flange part having large heat capacity. CONSTITUTION:The flange 4 in a hollow bearing member 1 having the flange part 4 is preheated, e.g. with a high frequency induction heating coil 16 for heating the flange part. Successively, a high frequency induction heating coil 11 is inserted and set into the hollow part 2 of the above member 1. By using this coil 11, the quench-hardened layer 6 formed in inner peripheral surface of the above member 1 is heated to execute the low temp. tempering treatment to the above hardened layer 6.</p> |
申请公布号 |
JPH04120212(A) |
申请公布日期 |
1992.04.21 |
申请号 |
JP19900237614 |
申请日期 |
1990.09.07 |
申请人 |
DENKI KOGYO CO LTD;NIPPON SEIKO KK |
发明人 |
YAMAMURO MASAKATSU;TERAKAWA ICHIRO |
分类号 |
C21D1/10;C21D1/18;C21D1/42 |
主分类号 |
C21D1/10 |
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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