发明申请
- 专利标题: High strength thin steel sheet having high hydrogen embrittlement resisting property
- 专利标题(中): 具有高耐氢脆性的高强度薄钢板
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申请号: US11317174申请日: 2005-12-27
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公开(公告)号: US20060137768A1公开(公告)日: 2006-06-29
- 发明人: Fumio Yuse , Shushi Ikeda , Yoichi Mukai , Hiroshi Akamizu , Junichiro Kinugasa , Kenji Saito , Koichi Sugimoto , Tomohiko Hojo
- 申请人: Fumio Yuse , Shushi Ikeda , Yoichi Mukai , Hiroshi Akamizu , Junichiro Kinugasa , Kenji Saito , Koichi Sugimoto , Tomohiko Hojo
- 申请人地址: JP Kobe-shi JP Ueda-shi
- 专利权人: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.),SHINSHU TLO CO., LTD.
- 当前专利权人: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.),SHINSHU TLO CO., LTD.
- 当前专利权人地址: JP Kobe-shi JP Ueda-shi
- 优先权: JP2004-381230 20041228; JP2004-381231 20041228; JP2004-381232 20041228; JP2005-147238 20050519; JP2005-147239 20050519; JP2005-147240 20050519
- 主分类号: C22C38/06
- IPC分类号: C22C38/06
摘要:
The purpose of the present invention is to provide a high strength thin steel sheet that has high hydrogen embrittlement resisting property. In order to achieve the above purpose, a high strength thin steel sheet having high hydrogen embrittlement resisting property comprises: C: 0.10 to 0.25%; Si: 1.0 to 3.0%; Mn: 1.0 to 3.5%; P: 0.15% or less; S: 0.02% or less; and Al: 1.5% or less (higher than 0%) in terms of percentage by weight, with balance of iron and inevitable impurities; and the metal structure comprises: residual austenite; 1% by area or more in proportion to the entire structure; bainitic ferrite and martensite: 80% or more in total; and ferrite and pearlite: 9% or less (may be 0%) in total, while the mean axis ratio (major axis/minor axis) of said residual austenite grains is 5 or higher, and the steel has tensile strength of 1180 MPa or higher.