专利检索 ap:("Nippon Steel Corporation") AND inv:"YAMAMOTO, Kenichi" 第 1 页

1.

发明授权
HIGH STRENGTH STEEL PLATE SUPERIOR IN STRETCH FLANGE FORMABILITY AND FATIGUE CHARACTERISTICS 有权

公开(公告)号：EP2048254B1

公开(公告)日：2020-08-19

申请号：EP07738099.6

申请日：2007-03-02

申请人： Nippon Steel Corporation

发明人： SASAI, Katsuhiro , OHASHI, Wataru , YAMAMOTO, Kenichi , KAWASAKI, Kaoru , HARADA, Hiroshi

IPC分类号： C22C38/00 , C22C38/14 , C22C38/38 , C21D9/46

2.

发明公开
HIGH-STRENGTH STEEL SHEET EXCELLENT IN STRETCH FLANGEABILITY AND FATIGUE PROPERTY 审中-公开
标题翻译：具有出色STRECKBÖRDELBARKEITS-和抗疲劳性能高强度钢板

公开(公告)号：EP2048254A1

公开(公告)日：2009-04-15

申请号：EP07738099.6

申请日：2007-03-02

申请人： Nippon Steel Corporation

发明人： SASAI, Katsuhiro , OHASHI, Wataru , YAMAMOTO, Kenichi , KAWASAKI, Kaoru , HARADA, Hiroshi

IPC分类号： C22C38/00 , C22C38/14 , C22C38/38 , C21D9/46

CPC分类号： C22C38/02 , C21D8/0426 , C21D9/46 , C21D9/48 , C21D2211/002 , C22C38/005 , C22C38/04

摘要： The present invention provides high strength hot rolled steel plate superior in stretch flange formability and fatigue characteristics comprising steel plate containing C: 0.03 to 0.20%, Si: 0.08 to 1.5%, Mn: 1.0 to 3.0%, P: 0.05% or less, S: 0.0005% or more, N: 0.0005 to 0.01%, acid soluble A1: 0.01% or less, acid soluble Ti: less than 0.008%, and a total of one or both of Ce or La: 0.0005 to 0.04%, having a balance of iron and unavoidable impurities and having a number ratio of 20% or less of stretched inclusions present in the steel plate having a circle equivalent diameter of 1 µm or more and a long axis/short axis of 5 or more.