Method of manufacturing the seawater corrosion resistance and low temperature toughness to excellent austenitic stainless clad steel

摘要

PROBLEM TO BE SOLVED: To provide an austenitic stainless-clad steel excellent in marine corrosion resistance and low-temperature toughness.;SOLUTION: In a method for manufacturing austenitic stainless-clad steel with 30 mm or more total thickness excellent in marine corrosion resistance and low-temperature toughness, a carbon steel contains, by mass%, 0.10-0.15% C; 0.25-0.40% Si; 0.45-2.0% Mn; ≤0.015% P; ≤0.004% S; ≤0.006% N; 0.01-0.1% Cr; 0.005-0.05% Nb; and 0.005-0.05% Al, and is composed of the balance Fe and unavoidable impurities, regarding the component composition. A clad steel material including the carbon steel as a base material and austenitic stainless steel as a laminated material is heated to temperature of 1,000-1,250°C before starting hot rolling, in which a cumulative rolling reduction of control rolling in a temperature range of 730-950°C is set to be 30% or more, and rolling finishing temperature is set to be 730-850°C.;COPYRIGHT: (C)2014,JPO&INPIT