METHOD FOR PRODUCING MARTENSITIC CORROSION RESISTANT STEEL FREE FROM PRODUCTION OF NETWORK CARBIDE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing martensitic corrosion resistant steel free from the production of network carbides by hot working. ;SOLUTION: In this method for producing martensitic corrosion resistant steel free from the production of network carbides, martensitic corrosion resistant steel containing, by weight, 0.1 to 1.2% C, ≤5.0% Si, ≤2.00% Mn, ≤0.05% P, ≤0.20% S, ≤2.0% Ni, 6.0 to 20.0% Cr, ≤5.0% Mo and 0.20% N, and the balance Fe with inevitable impurities is subjected to hot working at a temperature T (°C) satisfying the following inequality and is thereafter subjected to heat treatment at 800 to 900°C to suppress network carbides and to produce spheroidized carbides: 1/9 (3600 [C%]+200 [Cr%]+4700)≤T≤400 [C%]+20 [Cr%]+640, where T≤1250.;COPYRIGHT: (C)2001,JPO