发明申请
US20130216422A1 ABRASION RESISTANT STEEL PLATE WHICH EXHIBITS EXCELLENT WELD TOUGHNESS AND EXCELLENT DELAYED FRACTURE RESISTANCE
审中-公开
耐磨耐磨钢板，显示出优异的焊接韧性和优异的延迟抗断裂性
- 专利标题： ABRASION RESISTANT STEEL PLATE WHICH EXHIBITS EXCELLENT WELD TOUGHNESS AND EXCELLENT DELAYED FRACTURE RESISTANCE
- 专利标题（中）： 耐磨耐磨钢板，显示出优异的焊接韧性和优异的延迟抗断裂性
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申请号： US13806954申请日： 2011-06-29
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公开(公告)号： US20130216422A1公开(公告)日： 2013-08-22
- 发明人: Keiji Ueda , Shinichi Suzuki
- 申请人： Keiji Ueda , Shinichi Suzuki
- 申请人地址： JP Tokyo
- 专利权人： JFE STEEL CORPORATION
- 当前专利权人： JFE STEEL CORPORATION
- 当前专利权人地址： JP Tokyo
- 优先权： JP2010-149649 20100630; JP2011-142506 20110628
- 国际申请： PCT/JP2011/065416 WO 20110629
- 主分类号： C22C38/54
- IPC分类号： C22C38/54 ; C22C38/48 ; C22C38/42 ; C22C38/32 ; C22C38/28 ; C22C38/26 ; C22C38/24 ; C22C38/22 ; C22C38/12 ; C22C38/06 ; C22C38/04 ; C22C38/02 ; C22C38/00 ; C22C38/46 ; C22C38/44 ; C22C38/50
摘要：
Provided is an abrasion-resistant steel plate or sheet which exhibits excellent weld toughness and excellent delayed fracture resistance and is thus suitable for construction machines, industrial machines, and so on. Specifically provided is a steel plate or sheet which contains, in mass %, 0.20 to 0.30% of C, 0.05 to 1.0% of Si, 0.40 to 1.2% of Mn, 0.010% or less of P, 0.005% or less of S, 0.40 to 1.5% of Cr, 0.005 to 0.025% of Nb, 0.005 to 0.03% of Ti, 0.1% or less of Al, 0.01% or less of N, and, as necessary, one or more of Mo, W, B, Cu, Ni, V, REM, Ca and Mg, and has a DI* of 45 to 180 while satisfying the relationship: C+Mn/4−Cr/3+10P≦0.47, and which has a microstructure that comprises martensite as the matrix phase. DI*=33.85×(0.1×C)0.5×(0.7×Si+1)×(3.33×Mn+1)×(0.35×Cu+1)×(0.36×Ni+1)×(2.16×Cr+1)×(3×Mo+1)×(1.75×V+1)×(1.5×W+1)