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    • 5. 发明授权
    • Plated steel sheet
    • 镀钢板
    • US6087019A
    • 2000-07-11
    • US194389
    • 1998-11-30
    • Makoto IsobeChiaki KatoKazuhiro SetoMasaaki Kohno
    • Makoto IsobeChiaki KatoKazuhiro SetoMasaaki Kohno
    • C21D8/02C23C2/02C23C28/00B32B9/00
    • C23C2/02C21D8/0278C23C28/3225C23C28/345
    • This invention is a plated steel sheet formed by laminating an iron oxide layer and a plated layer on a steel matrix in this order, in which excellent plating adhesion property can uniformly be given to a full surface of the steel sheet by disposing a connection portion made from a metallic iron or an iron alloy connecting the steel matrix to the plated layer in the iron oxide layer. Particularly, it can provide means for easily forming a plated layer having an excellent adhesion property through hot dipping can be given to steel sheets being difficult to conduct the hot dipping such as high-strength steel sheet, stainless steel sheet and the like.
    • PCT No.PCT / JP97 / 01850 Sec。 371日期:1998年11月30日 102(e)1998年11月30日日期PCT提交1997年5月30日PCT公布。 公开号WO97 / 45569 日期1997年12月4日本发明是通过在钢基体上依次层叠铁氧化物层和镀层而形成的电镀钢板,其中可以通过以下方式均匀地赋予钢板的整个表面优异的电镀附着性 将由钢基体连接到金属铁或铁合金的连接部分设置在氧化铁层中的镀层上。 特别地,可以提供通过热浸渍容易地形成具有优异粘合性的镀层的方法,这样可以提供难以进行热浸镀的钢板,例如高强度钢板,不锈钢板等。
    • 9. 发明授权
    • Fe-Cr-Si based non-oriented electromagnetic steel sheet and process for producing the same
    • Fe-Cr-Si系无取向电磁钢板及其制造方法
    • US07465364B2
    • 2008-12-16
    • US10538501
    • 2003-12-18
    • Takeshi OmuraMasaaki KohnoMasaki Kawano
    • Takeshi OmuraMasaaki KohnoMasaki Kawano
    • H01F1/16
    • C21D1/76C22C38/004C22C38/008C22C38/06C22C38/34C22C38/60H01F1/14716
    • An Fe—Cr—Si based non-oriented electrical steel sheet contains 2.5% to 10% by mass of Si, 1.5% to 20% by mass of Cr, 0.006% by mass or less of C, 0.002% by mass or less of N, 0.005% by mass or less of S, 0.005% by mass or less of Ti, 0.005% by mass or less of Nb, and as necessary, 0.1% to 2% by mass of Al and at least one of 0.005% to 1% by mass of Sb and 0.005% to 1% by mass of Sn, and the balance being Fe and incidental impurities, wherein the electrical resistivity of the steel is 60 μΩcm or more, and the number of nitrides containing chromium per mm2 in the interior of the steel sheet is 2,500 or less. Consequently, the problem that high electrical resistance resulting from the high Si content and high Cr content is not satisfactorily utilized is advantageously solved, and it is possible to provide a non-oriented electrical steel sheet having excellent magnetic properties in the high-frequency range, in particular, in a frequency range of 1 kHz or more.
    • Fe-Cr-Si系非定向电工钢板含有2.5质量%〜10质量%的Si,Cr:1.5〜20质量%,C:0.006质量%以下,C:0.002质量% N,0.005质量%以下的S,0.005质量%以下的Ti,0.005质量%以下的Nb,根据需要,0.1质量%〜2质量%的Al和0.005质量%以下的至少一种 Sb为1质量%,Sn为0.005质量%〜1质量%,余量为Fe和偶然杂质,其中钢的电阻率为60微克以上,并且含有铬的氮化物数为 钢板内部为2500以下。 因此,有利地解决了由高Si含量和高Cr含量导致的高电阻不能令人满意地解决的问题,并且可以提供在高频范围内具有优异磁性的无取向电工钢板, 特别是在1kHz以上的频率范围内。
    • 10. 发明授权
    • Method of making austenitic stainless steel sheet
    • 制奥氏体不锈钢板的方法
    • US6149744A
    • 2000-11-21
    • US177470
    • 1998-10-23
    • Kunio FukudaTakumi UjiroMasaaki KohnoSusumu SatohMasahiro YoshiokaShinji Yamazaki
    • Kunio FukudaTakumi UjiroMasaaki KohnoSusumu SatohMasahiro YoshiokaShinji Yamazaki
    • C23G1/08C25F1/06C21D8/02
    • C23G1/086C25F1/06
    • Method of making a hot-rolled steel sheet having superior surface appearance, free of surface patterns and uneven glossiness from an austenitic stainless steel slab containing about 0.03 percent by weight or more of Cu, about 0.03 percent by weight or more of V, and about 0.01 percent by weight or more of Mo under any of the following conditions: (A) pickling in a nitric-hydrofluoric acid solution containing about 20 to 100 g/l of nitric acid and about 100 to 300 g/l of hydrofluoric acid; (B) controlling nitric-hydrofluoric acid content in response to the iron ion content in the solution; (C) a preliminary pickling step prior to finishing pickling; (D) grinding about 2 .mu.m or more of the surface after preliminary pickling and prior to finishing pickling; (E) causing counterflow with a relative flow rate of 0.5 to 5.0 m/sec on the sheet surface during finishing pickling; (F) adding sulfuric acid or sulfurous acid as a hydrogen ion source to the nitric-hydrofluoric acid solution; and (G) electrolysing during finishing pickling such that the ratio of the cathodic electrolysis time to the anodic electrolysis time is about 3 or more.
    • 制造含有约0.03重量%以上的Cu,约0.03重量%以上的V的奥氏体不锈钢板和具有大约0.03重量%以上的奥氏体不锈钢板的具有优异的表面外观,无表面图案和不均匀光泽度的热轧钢板的制造方法 在以下任一条件下,为0.01重量%以上的Mo:(A)在含有约20〜100g / l硝酸和约100〜300g / l氢氟酸的硝酸 - 氢氟酸溶液中酸洗; (B)响应于溶液中的铁离子含量控制硝酸 - 氢氟酸含量; (C)酸洗前的初步酸洗步骤; (D)在初步酸洗后,酸洗前,研磨约2μm或以上的表面; (E)在整理酸洗期间在片材表面上以0.5-5.0m / sec的相对流速引起逆流; (F)向硝酸 - 氢氟酸溶液中加入硫酸或亚硫酸作氢离子源; 和(G)在整理酸洗期间的电解,使得阴极电解时间与阳极电解时间的比例为约3以上。