发明授权
- 专利标题： High-strength stainless steel material and production process of the same
- 专利标题（中）： 高强度不锈钢材料和生产工艺相同
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申请号： US12811617申请日： 2009-02-02
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公开(公告)号： US08273191B2公开(公告)日： 2012-09-25
- 发明人: Naoki Hirakawa , Hiroshi Fujimoto , Satoshi Suzuki
- 申请人： Naoki Hirakawa , Hiroshi Fujimoto , Satoshi Suzuki
- 申请人地址： JP Tokyo
- 专利权人： Nisshin Steel Co., Ltd.
- 当前专利权人： Nisshin Steel Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Greenblum & Bernstein, P.L.C.
- 优先权： JP2008-027712 20080207
- 国际申请： PCT/JP2009/051725 WO 20090202
- 国际公布： WO2009/099035 WO 20090813
- 主分类号： C22C38/40
- IPC分类号： C22C38/40 ; C21D6/02
摘要：
Provided is a high-strength stainless steel material having less deterioration in mechanical strength and improved workability, particularly bending workability compared with conventional steel materials. The high-strength stainless steel material of the present invention has a specific composition, has a metal microstructure composed of two phases, that is a ferrite phase and a martensite phase, has a γmax of from 50 to 85, the γmax being represented by the following equation (1): γmax=420Wc+470WN+23WNi+7WMn−11.5WCr−11.5WSi+189 (1) wherein, Wc, WN, WNi, WMn, WCr, and WSi; represent contents (unit: mass %) of C, N, Ni, Mn, Cr, and Si relative to the total mass of the stainless steel material, respectively; and has a difference of 300 HV or less in hardness between the ferrite phase and the martensite phase.
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