PRODUCTION METHOD OF STAINLESS THIN STEEL SHEET HAVING EXCELLENT SURFACE LUSTER AND HIGH CORROSION RESISTANCE.

摘要

Producing thin stainless steel sheet having excellent surface lustre and high corrosion resistance comprises i) heating a continuous cast slab of ferrite (1) or martensite (2) type stainless steel contg. Cr (10-36wt %) at 1100-1300 deg.C for 260 minutes in an atmos. contg. oxygen (less than 7%). The 260 minutes includes the time in the furnace from preheating to extraction. ii) heat-rolling at a rolling finish temp of 900 deg.C or higher. iii) conducting mechanical descaling by adding an abrasion-cleaning agent (3) to water and spraying at high pressure onto the steel. (3) has a grain dia. of 400 microns or less and can be iron sand. iv) washing with an acid and v) cold-rolling the steel sheet while keeping the relation between the roll dia. and the reduction ratio in a zone where there is no "lap" vi) conducting final annealing.