发明名称 |
Ziehbares hochfestes dünnes Stahlblech mit hervorragender Formfixierungseigenschaft und Herstellungsverfahren dafür |
摘要 |
<p>The present invention provides a high-strength thin steel sheet drawable and excellent in a shape fixation property and a method of producing the same. For the steel sheet, on a plane at the center of the thickness of a steel sheet, the average ratio of the X-ray strength in the orientation component group of {100}<011> to {223}<110> to random X-ray diffraction strength is 2 or more and the average ratio of the X-ray strength in three orientation components of {554}<225>, {111}<112> and {111}<110> to random X-ray diffraction strength is 4 or less. The arithmetic average of the roughness Ra of at least one of the surfaces is 1 to 3.5 mum; the surfaces of the steel sheet are covered with a composition having a lubricating effect; and the friction coefficient of the steel sheet surfaces at 0 to 200° C. is 0.05 to 0.2. Further, the present invention also relates to a method of producing said steel sheet, characterized by: rolling a steel sheet having the chemical components specified in the present invention at a total reduction ratio of 25% or more in the temperature range of the Ar3 transformation temperature +100° C. or lower.</p> |
申请公布号 |
DE60224557(T4) |
申请公布日期 |
2015.06.25 |
申请号 |
DE2002624557T |
申请日期 |
2002.10.04 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
YOKOI, TATSUO;HAYASHIDA, TERUKI;SUGIURA, NATSUKO;NAKAMURA, TAKAAKI;NAKAMOTO, TAKEHIRO |
分类号 |
C22C38/00;C21D8/00;C21D8/02;C21D8/04;C22C38/02;C22C38/04;C22C38/06;C23C2/06;C23C2/26;C23C28/00;C23C30/00 |
主分类号 |
C22C38/00 |
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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