- 专利标题: AUSTENITIC STAINLESS STEEL SHEET, COVER MEMBER AND PRODUCTION METHOD FOR AUSTENITIC STAINLESS STEEL SHEET
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申请号: US15562986申请日: 2016-03-16
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公开(公告)号: US20180363087A1公开(公告)日: 2018-12-20
- 发明人: Takafumi KAWAGOE , Junichi KATSUKI
- 申请人: Nisshin Steel Co., Ltd.
- 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
- 优先权: JP2015-076635 20150403
- 国际申请: PCT/JP2016/058378 WO 20160316
- 主分类号: C21D9/46
- IPC分类号: C21D9/46 ; C22C38/58 ; C22C38/42 ; C22C38/44 ; C22C38/02 ; C22C38/00 ; C21D8/02 ; C21D6/00 ; C21D1/76 ; C23C8/10 ; G11B33/14 ; G11B33/02 ; B21B3/02
摘要:
In an austenitic stainless steel sheet, the arithmetic average roughness Ra is 0.2 μm or more and 1.2 μm or less. In addition, the dull pattern transfer rate on the steel sheet surface is 15% or more and 70% or less. Furthermore, micropits with a depth of 0.5 μm or more and an open area of 10 μm2 or more which are formed on the steel sheet surface have an existing density of 10.0 or less per 0.01 mm2 and an open area ratio of 1.0% or less. In addition, a film formed on the steel sheet surface is constituted from an oxide containing SiO2 as a main constituent, which oxide contains at least Si, N, Al, Mn, Cr, Fe, Nb, Ti and O as film-forming elements other than C, wherein the Si content is 10 at % or more, and the N content is 10 at % or less.
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