发明申请
- 专利标题： AUSTENITE-TYPE STAINLESS STEEL HOT-ROLLING STEEL MATERIAL WITH EXCELLENT CORROSION RESISTANCE, PROOF-STRESS, AND LOW-TEMPERATURE TOUGHNESS AND PRODUCTION METHOD THEREOF
- 专利标题（中）： 奥氏体不锈钢热轧钢材，具有优良的耐腐蚀性，耐应力和低温韧性及其生产方法
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申请号： US12391045申请日： 2009-02-23
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公开(公告)号： US20100230011A1公开(公告)日： 2010-09-16
- 发明人: Yuusuke Oikawa , Shinji Tsuge , Shigeo Fukumoto , Kazuhiro Suetsugu , Ryo Matsuhashi , Hiroshige Inoue
- 申请人： Yuusuke Oikawa , Shinji Tsuge , Shigeo Fukumoto , Kazuhiro Suetsugu , Ryo Matsuhashi , Hiroshige Inoue
- 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
- 优先权： JPP2005-026176 20050202; JPP2005-026177 20050202; JPP2006-012569 20060120
- 主分类号： C22C38/44
- IPC分类号： C22C38/44 ; C22C38/42 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/54 ; C22C38/58 ; C22C30/02
摘要：
An austenitic stainless steel hot-rolled steel material can be provided which has sea-water resistance and strength superior to conventional steel. Low-temperature toughness can be maintained, which is preferable in a structural member of speedy craft. The steel material can include an austenitic stainless steel hot-rolled steel material which excels in the properties of corrosion resistance, proof stress, and low-temperature toughness. In such austenitic stainless steel hot-rolling steel material, e.g., PI [=Cr+3.3(Mo+0.5W)+16N] ranges from 35 to 40, δ cal [=2.9(Cr+0.3Si+Mo+0.5W)−2.6(Ni+0.3Mn+0.25Cu+35C+20N)−18] ranges from −6 to +2, and a 0.2% proof stress at room temperature is not less than 550 MPa, Charpy impact value measured using a V-notch test piece at −40° C. is not less than 100 J/cm2, and the pitting potential measured in a deaerated aqueous solution of 10% NaCl at 50° C. (Vc'100) is not less than 500 mV (as it relates to saturated Ag/AgCl).