MANUFACTURE OF DUPLEX STAINLESS STEEL SHEET EXTREMELY SMALL IN ROUGHENING OF SURFACE CAUSED BY SUPERPLASTIC FORMING

摘要

PURPOSE: To offer a method for manufacturing a duplex stainless steel sheet extremely small in the roughening of the surface similar to roping at the time of executing superplastic forming. ;CONSTITUTION: A duplex stainless steel sheet small in the roughening of the surface caused by superplastic forming is obtd. by subjecting a duplex stainless steel cast slab contg., by weight, ≤0.02% C, ≤2.0% Si, ≤3.0% Mn, 3 to 10% Ni, 20 to 35% Cr, 0.5 to 6.0% Mo, 0.08 to O.3% N and the balance Fe with inevitable impurities to hot rolling at ≥125°C and executing cold rolling at ≥70% draft in a direction different from the above hot rolling direction.;COPYRIGHT: (C)1993,JPO&Japio