METHOD FOR PREPARING OXIDE DISPERSION STRENGTHENING F/M STEEL USING SMELTING AND CASTING PROCESS

摘要

A method for preparing oxide dispersion strengthening F/M steel using smelting and casting process, belongs to the field of metal materials. The composition of the steel comprises: C: 0.08˜0.15%, Cr: 8.0˜14%, Mn: 0.45˜0.6%, W: 1.0˜2.5%, N: 0.05˜0.07%, Ta: 0.010˜0.20%, Ti: 0.02˜0.55%, Si: 0.10˜0.15%, V; 0.04˜0.5%, O: 30˜200 ppm, B0.001%, S0.003%, P0.005%, Y powder in the casting mould is 0.01˜1%, the rest is Fe. The rolling temperature of the steel is 1100° C.˜800° C.; heat treatment after rolling comprises: quenching at 850˜1100° C./15˜120 min; tempering at 710˜800° C./90˜120 min. The material has high strength under high temperature and low ductile-brittle transition.