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    • 10. 发明专利
    • PRODUCTION OF AUSTENITIC STAINLESS STEEL SHEET
    • JPH11131271A
    • 1999-05-18
    • JP29566397
    • 1997-10-28
    • KAWASAKI STEEL CO
    • FUKUDA KUNIOKONO MASAAKIUGI TAKUMISATO SUSUMUYOSHIOKA MASAHIRO
    • C25F1/06C21D20060101C23G20060101C23G1/08
    • PROBLEM TO BE SOLVED: To produce the steel sheet in such a manner that the surface of a hot rolled steel sheet subjected to annealing and pickling after hot rolling or the surface of a cold rolled steel sheet after cold rolling using rolls with large diameter is free from unevenness in glossiness and has uniform surface properties by executing pickling with a mixed soln. in specified concn. ranges in which the concn. of nitric acid is made low and the concn. of hydrofluoric acid is made high. SOLUTION: An austenitic stainless steel is subjected to hot rolling and is thereafter subjected to annealing and pickling to produce a steel sheet. At this time, the picking is executed in such a manner that the steel sheet after the annealing is immersed into a mixed soln. contg. nitric acid of 20 to 100 g/l concn. and hydrofluoric acid of 100 to 300 g/l concn. Furthermore, this mixed soln. is added with sulfuric acid or sulfurous acid as a hydrogen ion source. Moreover, electrolytic treatment is executed so as to make the steel sheet in the process of being immersed into the mixed soln. a cathode or an anode in alternation, and, furthermore, the electrolytic treating time is allowed to satisfy a ratio of (the cathode electrolytic treating time)/(the anode electrolytic treating time) of >=3.