发明授权
- 专利标题: Ferrite-austenite stainless steel sheet excellent in ridging resistance and workability and process for manufacturing the same
- 专利标题(中): 耐翘曲性和加工性优异的铁素体 - 奥氏体不锈钢板及其制造方法
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申请号: US12735615申请日: 2009-01-30
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公开(公告)号: US08226780B2公开(公告)日: 2012-07-24
- 发明人: Masaharu Hatano , Akihiko Takahashi , Eiichiro Ishimaru , Ken Kimura
- 申请人: Masaharu Hatano , Akihiko Takahashi , Eiichiro Ishimaru , Ken Kimura
- 申请人地址: JP Tokyo 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 JP Tokyo
- 代理机构: Kenyon & Kenyon LLP
- 优先权: JP2008-025112 20080205; JP2008-330428 20081225
- 国际申请: PCT/JP2009/051611 WO 20090130
- 国际公布: WO2009/099010 WO 20090813
- 主分类号: C22C38/18
- IPC分类号: C22C38/18 ; C22C38/40 ; C22C38/42 ; C21D8/02 ; C21D8/04
摘要:
This ferrite-austenite stainless steel sheet includes: in terms of mass %, C: 0.1% or less; Cr: 17 to 25%; Si: 1% or less; Mn: 3.7% or less; Ni: 0.6 to 3%; Cu: 0.1 to 3%; and N: 0.06% or more and less than 0.15%, with the remainder being Fe and inevitable impurities, wherein the steel sheet has a two-phase structure consisting of a ferrite phase and an austenite phase, a volume fraction of the austenite phase is in a range of 15 to 70%, and in a sheet plane (ND) of a center of a sheet thickness, grains of the ferrite phase having a crystal orientation satisfying ND//{111}±10° and grains of the ferrite phase having a crystal orientation satisfying ND//{101}±10° are present in a total content of 10% by area or more.
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