PRODUCTION OF MARTENSITIC STAINLESS CLAD STEEL PLATE HAVING EXCELLENT CORROSION RESISTANCE, WEAR RESISTANCE AND TOUGHNESS

摘要

PURPOSE:To obtain the title stainless clad steel having excellent wear resistance, toughness and corrosion resistance by subjecting a cladding slab consisting of a metal of a martensitic stainless steel and base metal of a carbon steel respectively having specific component compsns. to hot rolling at a prescribed draft then cooling the same at a specified cooling rate. CONSTITUTION:The cladding slab consisting of the metal of the martenstitic stainless steel contg. =0.05% C, 11-15% Cr and 3-6% Ni and the base metal consisting of the carbon steel contg. 0.01-0.20% C, 0.01-1.0% Si and 0.50-2.0% Mn is treated in the following manner: The slab is heated to =1000 deg.C to heat the cladding metal and the base metal respectively up to the austenite single phase region and to accelerate the resolutionization of the alloy elements. The above-mentioned slab after the heating is then subjected to rolling of =10% draft at 900-750 deg.C and is cooled down to =150 deg.C at =2 deg.C/S cooling rate from =750 deg.C. The desired stainless clad steel having the excellent corrosion resistance, wear resistance and toughness is thereby obtd.