发明授权
- 专利标题： Heavy-wall H-shaped steel having high toughness and yield strength and process for making steel
- 专利标题（中）： 具有高韧性和屈服强度的重型H型钢及其制造方法
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申请号： US257185申请日： 1999-02-25
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公开(公告)号： US6007644A公开(公告)日： 1999-12-28
- 发明人: Akio Ohmori , Tatsumi Kimura , Fumimaru Kawabata , Keniti Amano
- 申请人： Akio Ohmori , Tatsumi Kimura , Fumimaru Kawabata , Keniti Amano
- 申请人地址： JPX Hyogo
- 专利权人： Kawasaki Steel Corporation
- 当前专利权人： Kawasaki Steel Corporation
- 当前专利权人地址： JPX Hyogo
- 优先权： JPX10-053984 19980305
- 主分类号： C22C38/00
- IPC分类号： C22C38/00 ; C21D8/00 ; C22C38/04 ; C22C38/12 ; C22C38/14 ; C22C38/58 ; C21D7/13 ; C22C38/06
摘要：
A high-strength heavy-wall H-shaped steel is excellent in Z-direction toughness at the flange thickness center. The heavy-wall H-shaped steel is comprised of by weight from about 0.05 to 0.18% C, up to about 0.60% Si, from about 1.00% to about 1.80% Mn, up to about 0.020% P, under 0.004% S, from 0.016% to 0.050% Al, from 0.04% to 0. 15% V, and from 0.0070% to 0.0200% N, and one or more of from about 0.02% to about 0.60% Cu, from about 0.02% to about 0.60% Ni, from about 0.02% to about 0.50% Cr, and from about 0.01% to about 0.20% Mo; and the balance being Fe and incidental impurities. Also, (V.times.N)/S.gtoreq.0.150; the Ti content is within a range satisfying 0.002.ltoreq.Ti.ltoreq.1.38.times.N-8.59.times.10.sup.-4 ; Ceq (=C+Si/24+Mn/6+Ni/40+Cr/5+Mo/4+V/14) is within a range of from about 0.36 wt % to about 0.45 wt %, and the yield strength is at least 325 MPa.
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