发明名称 |
CAR-BODY REINFORCING MEMBER, FRONT SIDE MEMBER, AND CAR-BODY SIDE STRUCTURE |
摘要 |
<p>A strength member for an automobile body such as a side member or a pillar which has a bent portion which is bent two-dimensionally or three-dimensionally and which has an ultrahigh strength with a tensile strength exceeding 1100 MPa is provided. The strength member for an automobile body has a tubular body which has a closed cross section which does not have an outwardly-extending flange and which has a bent portion which is bent two-dimensionally or three-dimensionally, a portion to be cut or punched, and a portion to be welded. The tubular body has an ultrahigh strength heat-treated portion which has been heat treated to have a tensile strength exceeding 1100 MPa, a high strength heat-treated portion which is the remainder other than the ultrahigh strength heat-treated portion and which has been heat treated to have a tensile strength of at least 600 MPa and at most 1100 MPa, and/or a low strength heat-treated portion which is the portion to be cut or punched or the portion to be welded and which has been heat treated to have a tensile strength of less than 600 MPa.</p> |
申请公布号 |
EP2143621(B1) |
申请公布日期 |
2012.05.23 |
申请号 |
EP20080739484 |
申请日期 |
2008.03.31 |
申请人 |
SUMITOMO METAL INDUSTRIES, LTD. |
发明人 |
YOSHIDA, MICHITAKA;KOJIMA, NOBUSATO;TOMIZAWA, ATSUSHI;SHIMADA, NAOAKI |
分类号 |
B62D25/08;B21D7/08;B62D25/06 |
主分类号 |
B62D25/08 |
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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