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1.发明申请公开(公告)号：US20180078981A1
公开(公告)日：2018-03-22
申请号：US15562768
申请日：2016-03-16
发明人： Takafumi KAWAGOE , Junichi KATSUKI
IPC分类号： B21B1/22 , B21B3/02 , C21D9/46 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/40
CPC分类号： B21B1/22 , B21B3/02 , B21B2001/221 , B21B2001/228 , B21B2201/04 , B21B2261/04 , B21B2261/14 , C21D1/76 , C21D8/0236 , C21D8/0273 , C21D8/0294 , C21D9/46 , C21D2211/005 , C22C38/001 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/40 , C23C8/02 , C23C8/10 , C23C8/18 , C23C8/60 , G11B33/08 , G11B33/14
摘要： In a ferritic 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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公开(公告)号：US20190226044A1
公开(公告)日：2019-07-25
申请号：US16311791
申请日：2016-12-13
发明人： Takafumi KAWAGOE , Teruhiko SUETSUGU , Koji SETO
摘要： A ferritic stainless steel sheet is a ferritic stainless steel sheet which is temper rolled after bright annealing and has a passivation film. The area ratio of minute defects having an area of 10 μm2 or more on the surface of the steel sheet is 0.2% or more and 1.5% or less. In addition, the thickness of the passivation film is 1 nm or more and 10 nm or less, the average concentration of Si in the passivation film is 10 at % or more and 20 at % or less, and the average concentration ratio of Si, Al, Cr and Fe in the passivation film component is (Si+Al+Cr)/Fe>1.0.
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3.发明申请公开(公告)号：US20180363087A1
公开(公告)日：2018-12-20
申请号：US15562986
申请日：2016-03-16
发明人： Takafumi KAWAGOE , Junichi KATSUKI
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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