Press compactibility, resistance rijingu Characteristic and production manner null of the ferrite stainless steel steel strip which is superior in surface

摘要

PROBLEM TO BE SOLVED: To minimize the occurrence of surface defects by performing one of the passes at the time of hot rolling at respectively specified temp., coefficient of friction, and draft and also performing cold rolling by means of a work roll of specific roll diameter. ;SOLUTION: A steel stock, having a composition which consists of, by mass, ≤0.01% C, ≤1.0% Si, ≤1.0% Mn, 11-30% Cr, ≤0.07% Al, ≤0 02% N, ≤0 01% S, ≤0.01% O, Ti in the amount satisfying (Ti-2×S-3×O)/(C+N)≥4 and Ti×N≤0.003, and the balance Fe and also satisfies C+N=0.006 to 0.025% and N/C≥2, is used. This steel stock is hot-rolled, annealed, pickled, and cold- rolled. At this time, one of the passes in a roughing stage is carried out under the conditions of 900-1150°C rolling temp., ≤0.3 coefficient of friction between the rolling stock and the roll, and 40-75% draft, and further, cold rolling is done so that at least 50% of rolling reduction is attained by means of a work roll of ≥500mm roll diameter. By this method, an excellent material can be attained by a single cold rolling method, and the ferritic stainless steel strip can be inexpensively provided.;COPYRIGHT: (C)1997,JPO