MANUFACTURE OF FERRITIC STAINLESS STEEL MATERIAL HAVING SUPERIOR PITTING CORROSION RESISTANCE

摘要

PURPOSE:To provide superior pitting corrosion resistance to a ferritic stainless steel material contg. Ti by heating the steel material to a specified temp. under a specified reduced pressure. CONSTITUTION:The composition of a ferritic stainless steel material is composed of 8-22wt% Cr, 0.2-2.5wt% Ti and the balance Fe with inevitable impurities. The steel material is heated to =650 deg.C, especially 650-1,000 deg.C under a reduced pressure of =2X10-2 Pa.