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    • 1. 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。
    • 8. 发明授权
    • Ferritic stainless steel plate excellent in deep drawability and
anti-ridging property and production method thereof
    • 铁素体不锈钢板具有优异的深冲性和抗皱性能及其制造方法
    • US6113710A
    • 2000-09-05
    • US269295
    • 1999-03-29
    • Yasushi KatoTakumi UjiroSusumu Satoh
    • Yasushi KatoTakumi UjiroSusumu Satoh
    • C21D9/48C21D8/04C22C38/00C22C38/18C22C38/24C22C38/26C22C38/28C22C38/54
    • C22C38/18C21D8/0405C22C38/24C22C38/26C22C38/28C21D8/0426
    • The present invention provides a ferritic stainless steel plate improved in the deep drawability and the anti-ridging property at deep drawing work and the production technique thereof. The practical construction of the present invention is a ferritic stainless steel plate containing from 0.001 to 0.015 wt. % C, not more than 1.0 wt. % Si, not more than 1.0 wt. % Mn, not more than 0.05 wt. % P, not more than 0.010 wt. % S, from 8 to 30 wt. % Cr, not more than 0.08 wt. % Al, from 0.005 to 0.015 wt. % N, not more than 0.0080 wt. % O, not more than 0.25 wt. % Ti with Ti/N.gtoreq.12, and from 0.05 to 0.10 wt. % (Nb+V) with V/Nb being from 2 to 5, and, if necessary, further containing one or more kinds selected from not more than 2.0 wt. % Mo, not more than 1.0 wt. % Ni, and not more than 1.0 wt. % Cu together with one or more kinds selected from from 0.0005 to 0.0030 wt. % B, from 0.0007 to 0.0030 wt. % Ca and from 0.0005 to 0.0030 wt. % Mg. Furthermore, in the production method of the present invention, the above-described ferritic stainless steel plate is produced by heating the steel slab made up of the above-described components to a temperature range of 1170.degree. C. or lower, finishing rough hot rolling of the slab at a temperature range of 950.degree. C. or higher, and then carrying out hot finish-rolling.
    • PCT No.PCT / JP98 / 03469 Sec。 371 1999年3月29日第 102(e)1999年3月29日PCT PCT 1998年8月4日PCT公布。 公开号WO99 /​​ 07909 日期1999年2月18日本发明提供了一种改进深冲性和深冲压加工抗皱性能的铁素体不锈钢板及其制造方法。 本发明的实际构造是含有0.001〜0.015重量%的铁素体不锈钢板。 %C,不大于1.0wt。 %Si,不大于1.0wt。 %Mn,不大于0.05wt。 %P,不大于0.010重量% %S,8〜30wt。 %Cr,不大于0.08wt。 %Al,0.005〜0.015wt。 %N,不大于0.0080wt。 %O,不大于0.25wt。 %Ti,Ti / N> / = 12,和0.05〜0.10wt。 %(Nb + V),V / Nb为2〜5,如果需要,还含有选自不超过2.0重量%的一种或多种。 %Mo,不大于1.0wt。 %Ni,不大于1.0wt。 %Cu与选自0.0005至0.0030重量%的一种或多种。 %B,0.0007-0.0030wt。 %Ca和0.0005〜0.0030wt。 %Mg。 此外,在本发明的制造方法中,上述铁素体系不锈钢板是将由上述构成的钢坯加热至1170℃以下的温度范围, 在950℃以上的温度范围内进行热精轧。