发明名称 Method of making austenitic stainless steel sheet
摘要 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. <IMAGE>
申请公布号 EP0915185(A1) 申请公布日期 1999.05.12
申请号 EP19980120434 申请日期 1998.10.28
申请人 KAWASAKI STEEL CORPORATION 发明人 FUKUDA, KUNIO;UJIRO, TAKUMI;KOHNO, MASAAKI;SATOH, SUSUMU;YOSHIOKA, MASAHIRO;YAMAZAKI, SHINJI
分类号 C23G1/08;C25F1/06 主分类号 C23G1/08
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