发明名称 |
BOLT AND MANUFACTURING METHOD OF BOLT |
摘要 |
A bolt has a male screw with a surface hardening portion that has an increased surface hardness and that is applied with a compressive residual stress. The male screw is formed by cutting the bolt, and performing a process to provide at least on the surface of the male screw of the bolt the surface hardening portion that has increased hardness and that is applied with a compressive residual stress. As a result, the fatigue resistance of the male screw is improved and the bolt is effective for use in a portion where the male screw is subject to a repetitive stress.
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申请公布号 |
US2011268533(A1) |
申请公布日期 |
2011.11.03 |
申请号 |
US201113178928 |
申请日期 |
2011.07.08 |
申请人 |
TEZUKA NORIKAZU;HIROKAWA KAZUHARU;IHARA KEISUKE;OSAWA KEI;ISHIKAWA HIROSHI;TORIGOE TAIJI;YAMAMOTO RYUICHI;HASHIMOTO YUKIHIRO;IZUTSU NOBUYUKI;TAKAHASHI KOJI |
发明人 |
TEZUKA NORIKAZU;HIROKAWA KAZUHARU;IHARA KEISUKE;OSAWA KEI;ISHIKAWA HIROSHI;TORIGOE TAIJI;YAMAMOTO RYUICHI;HASHIMOTO YUKIHIRO;IZUTSU NOBUYUKI;TAKAHASHI KOJI |
分类号 |
F16B35/04;C21D7/06 |
主分类号 |
F16B35/04 |
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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