公开(公告)号：US20060137768A1

公开(公告)日：2006-06-29

申请号：US11317174

申请日：2005-12-27

申请人： Fumio Yuse ,  Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Junichiro Kinugasa ,  Kenji Saito ,  Koichi Sugimoto ,  Tomohiko Hojo

发明人： Fumio Yuse ,  Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Junichiro Kinugasa ,  Kenji Saito ,  Koichi Sugimoto ,  Tomohiko Hojo

IPC分类号： C22C38/06

CPC分类号： C22C38/02 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16

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.

摘要翻译： 本发明的目的是提供一种具有高耐氢脆性的高强度薄钢板。 为了实现上述目的，具有高耐氢脆性的高强度薄钢板包括：C：0.10〜0.25％ Si：1.0〜3.0％ Mn：1.0〜3.5％ P：0.15％以下; S：0.02％以下; 和Al：1.5重量％以下（高于0重量％），余量为铁和不可避免的杂质; 并且金属结构包括：残余奥氏体; 1％以上，占整个结构的比例; 贝氏体铁素体和马氏体总计为80％以上; 铁素体和珠光体的总和为9％以下（可以为0％），而残留奥氏体晶粒的平均轴比（长轴/短轴）为5以上，钢的拉伸强度为1180MPa， 更高。

公开(公告)号：US20060137769A1

公开(公告)日：2006-06-29

申请号：US11317181

申请日：2005-12-27

申请人： Fumio Yuse ,  Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Junichiro Kinugasa ,  Kenji Saito ,  Koichi Sugimoto ,  Tomohiko Hojo

发明人： Fumio Yuse ,  Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Junichiro Kinugasa ,  Kenji Saito ,  Koichi Sugimoto ,  Tomohiko Hojo

IPC分类号： C22C38/06

CPC分类号： C22C38/02 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： The present invention provides a high strength thin steel sheet that has high hydrogen embrittlement resisting property and high workability. The high strength thin steel sheet having high hydrogen embrittlement resisting property has a metallurgical structure after stretch forming process to elongate 3% comprises: (i) 1% or more residual austenite; 80% or more in total of bainitic ferrite and martensite; and 9% or less (may be 0%) in total of ferrite and pearlite in terms of proportion of area to the entire structure, wherein the mean axis ratio (major axis/minor axis) of the residual austenite grains is 5 or higher, or (ii) 1% or more residual austenite in terms of proportion of area to the entire structure; mean axis ratio (major axis/minor axis) of the residual austenite grains is 5 or higher; mean length of minor axes of the residual austenite grains is 1 μm or less; minimum distance between the residual austenite grains is 1 μm or less; and the steel has tensile strength of 1180 MPa or higher.

摘要翻译： 本发明提供耐氢脆性高，加工性高的高强度薄钢板。 具有高耐氢脆性能的高强度薄钢板在拉伸成形过程之后具有冶金结构以延长3％，包括：（i）1％或更多的残余奥氏体; 总共为贝氏体铁素体和马氏体的80％以上; 以与面积相对于整个结构的面积的比例计算的铁素体和珠光体的总和为9％以下（可以为0％），其中残余奥氏体晶粒的平均轴比（长轴/短轴）为5以上， 或（ii）以面积与整个结构的比例计算的1％或更多的残余奥氏体; 残余奥氏体晶粒的平均轴比（长轴/短轴）为5以上; 残余奥氏体晶粒的短轴的平均长度为1μm以下; 残余奥氏体晶粒之间的最小距离为1um或更小; 钢的拉伸强度为1180MPa以上。