发明授权
- 专利标题： Duplex stainless steel superior in corrosion resistance of weld
- 专利标题（中）： 双相不锈钢焊接耐腐蚀性优异
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申请号： US14004039申请日： 2012-03-09
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公开(公告)号： US09365914B2公开(公告)日： 2016-06-14
- 发明人: Yusuke Oikawa , Shinji Tsuge , Hiroshige Inoue , Ryo Matsuhashi
- 申请人： Yusuke Oikawa , Shinji Tsuge , Hiroshige Inoue , Ryo Matsuhashi
- 申请人地址： JP Tokyo
- 专利权人： NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
- 当前专利权人： NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
- 当前专利权人地址： JP Tokyo
- 代理机构： Kenyon & Kenyon LLP
- 优先权： JP2011-051071 20110309; JP2012-030142 20120215
- 国际申请： PCT/JP2012/056154 WO 20120309
- 国际公布： WO2012/121380 WO 20120913
- 主分类号： C22C38/42
- IPC分类号： C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/58 ; C22C38/00 ; C21D6/00 ; C22C38/02 ; C22C38/06 ; C22C38/50 ; C22C38/52 ; C22C38/54 ; C21D8/02 ; B23K35/30 ; B23K35/02
摘要：
A nitrogen-rich two-phase stainless steel that has corrosion resistance equal to that of standard type of two-phase stainless steel and is not susceptible to corrosion in a welding heat-affected part, wherein the austenite phase area ratio is 40-70%, the PI value expressed by formula (1) is 30-38, the NI value expressed by formula (2) is 100-140, and the γpre expressed by formula (3) is 1350-1450. (1) PI=Cr+3.3Mo+16N (2) NI=(Cr+Mo)/N.