| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless-steel sheet with excellent corrosion resistance, and to provide a process for producing the same. SOLUTION: The ferritic stainless-steel sheet contains up to 0.03% C, up to 1.0% Si, up to 0.5% Mn, up to 0.04% P, up to 0.02% S, up to 0.1% Al, 20.5 to 22.5% Cr, 0.3 to 0.8% Cu, up to 1.0% Ni, 4×(C%+N%) to 0.35% Ti, up to 0.01% Nb, and up to 0.03% N, provided that C+N is up to 0.05% and the remainder is Fe and unavoidable impurities. It satisfies the relationship 240+35×(Cr%-20.5)+280×äTi%-4×(C%+N%)}≥280. Further, upon the production of the steel sheet, a stainless steel having a composition containing the above and satisfying the above inequality as the stock is subjected to hot rolling, and the hot rolled sheet is subjected to continuous annealing at 800 to 1,000°C, is thereafter pickled, and is subsequently subjected to the stages of cold rolling, finish annealing, cooling and pickling, so as to be a cold rolled-annealed sheet. COPYRIGHT: (C)2007,JPO&INPIT
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