Rare earth hard alloy and preparation method and application thereof

US11788174B1 · kind B1 · utility

Assignees

• CENTRAL SOUTH UNIVERSITY · CN
• Jiangxi University of Science and Technology · CN

Inventors

• Yong Du · Qiaonanxiang, CN
• Jian Lv · Shijiazhuang, CN
• Keke Chang · Qiaonanxiang, CN
• Weibin Zhang · Pittsford, US
• Ming Lou · Shanghai, CN
• Zepeng Li · Beijing, CN
• Yangqing Lv · Qiaonanxiang, CN

Key dates

• Filing date: May 30, 2023
• Grant date: Oct 17, 2023
• Expiry date: May 30, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C29/067
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention provides a rare earth hard alloy and a preparation method and application thereof. The rare earth hard alloy includes 6 to 15 wt % of a binding phase and the balance of a hard phase, wherein the binding phase includes 30 to 50 wt % of Ni3Al, 0.1 to 0.5 wt % of a rare earth element and the balance of Ni. According to the rare earth hard alloy provided by the invention, the Ni—Ni3Al-rare earth element (e.g., Ni—Ni3Al—Y)-based binding phase is strengthened by Ni3Al, and an ordered strengthening phase is formed and is diffused and distributed in the binding phase, such that the rare earth hard alloy has a better high-temperature oxidation resistance, a better room-temperature fracture toughness and a better high-temperature bending strength than a conventional hard alloy.