发明申请
- 专利标题： BOLT AND MANUFACTURING METHOD OF BOLT
- 专利标题（中）： 螺栓的螺栓和制造方法
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申请号： US13178928申请日： 2011-07-08
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公开(公告)号： US20110268533A1公开(公告)日： 2011-11-03
- 发明人: Norikazu TEZUKA , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
- 申请人： Norikazu TEZUKA , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
- 优先权： JP2006-034168 20060210
- 主分类号： F16B35/04
- IPC分类号： F16B35/04 ; C21D7/06
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.
公开/授权文献
- US08607604B2 Bolt and manufacturing method of bolt 公开/授权日：2013-12-17
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