Auxiliary alloy casting piece, high-remanence and high-coercive force NdFeB permanent magnet, and preparation methods thereof

US12087481B2 · kind B2 · utility

Assignee

• Baotou Jinshan Magnetic Material Co., Ltd. · CN

Inventors

• Feng Xia · Vienna, US
• Yulong FU · 翁根苏木, CN
• Chen Chen · 安丰镇, CN
• Hailong Zheng · 翁根苏木, CN
• Zichao Wang · 翁根苏木, CN
• Yonghong Liu · Qingdao, CN
• Caina Sun · 翁根苏木, CN
• Yu-Kai Wang · 龙王头村, CN

Key dates

• Filing date: Dec 30, 2022
• Grant date: Sep 10, 2024
• Expiry date: Jan 17, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C2202/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Provided are an auxiliary alloy casting piece, a high-remanence and high-coercive force NdFeB permanent magnet, and preparation methods thereof. The method for preparing the auxiliary alloy casting piece includes the following steps: providing an auxiliary alloy material including, by mass percentage, 40% to 45% of Pr, 1% to 2% of Co, 0.5% to 1% of Ga, 0.6% to 0.8% of B, 0.1% to 0.2% of V, 0.3% to 0.7% of Ti, and a balance of Fe; smelting the auxiliary alloy material to obtain a smelted material; and subjecting the smelted material to a quick-setting casting to obtain the auxiliary alloy casting piece; where the quick-setting casting includes a refining and a casting in sequence.