Rare earth die steel and preparation method thereof

US11718902B2 · kind B2 · utility

Assignees

• Jiangxi University of Science and Technology · CN
• Guorui Scientific Innovation Rare Earth Functional · CN

Inventors

• Zhigang Wang · Lexington, US
• Liang Qi · Xi'an, CN
• Hebin WANG · Ganzhou, CN
• Jieyun YE · Ganzhou, CN
• Weihao CAI · Ganzhou, CN
• Xuwei LIU · Ganzhou, CN

Key dates

• Filing date: Feb 14, 2022
• Grant date: Aug 8, 2023
• Expiry date: Feb 14, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/005
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present disclosure provides rare earth die steel. Mg and B elements are added on the basis of adding rare earth element Y, so that the rare earth element purifies a matrix, and grain boundary occupation by Mg and B is fully utilized to regulate grain network chromium carbides. In addition, the B element can fully improve hardenability of austenite and ensure that non-martensite such as bainite does not appear during the cooling process, and therefore rare earth die steel with high impact toughness and high isotropy is obtained.