发明名称 |
Dual phase-structured hot rolled high-tensile strength steel sheet and a method of producing the same |
摘要 |
A dual phase-structured hot rolled steel sheet having a composition consisting of 0.03-0.15% by weight of C. 0.6-1.8% by weight of Mn, 0.04-0.2% by weight of P, not more than 0.10% of Al, not more than 0.008% by weight of S, and the remainder being substantially Fe, and having a microstructure consisting of ferrite and martensite dispersed therein, the area fraction of said ferrite being at least 70% and that of said martensite being at least 5% at the section of the steel sheet, has a high tensile strength and a low yield ratio of not higher than 70%, and has excellent formability. The steel sheet can be produced in a simple manner by cooling directly a hot rolled sheet at an ordinary cooling rate without the use of a particular cooling pattern.
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申请公布号 |
US4561910(A) |
申请公布日期 |
1985.12.31 |
申请号 |
US19830549221 |
申请日期 |
1983.11.07 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
KATO, TOSHIYUKI;TAKAHASHI, ISAO;IRIE, TOSHIO;OGAWA, YOZO |
分类号 |
C21D8/02;C21D9/46;C22C38/00;C22C38/04;C22C38/18;(IPC1-7):C21D9/48 |
主分类号 |
C21D8/02 |
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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