Method for preparing oxide dispersion strengthening F/M steel using smelting and casting process

US11203792B2 · kind B2 · utility

Assignee

• University of Science and Technology Beijing · CN

Inventors

• Qingzhi Yan · Beijing, CN
• Zhiyuan HONG · Beijing, CN

Key dates

• Filing date: Aug 2, 2018
• Grant date: Dec 21, 2021
• Expiry date: May 3, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D2211/008
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for preparing oxide dispersion strengthening F/M steel using smelting and casting process, which 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, B<0.001%, S<0.003%, P<0.005%, 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.