公开(公告)号：US12087481B2

公开(公告)日：2024-09-10

申请号：US18091899

申请日：2022-12-30

Applicant: Baotou Jinshan Magnetic Material Co., Ltd.

Inventor： Feng Xia ,  Yulong Fu ,  Chen Chen ,  Hailong Zheng ,  Zichao Wang ,  Yonghong Liu ,  Caina Sun ,  Yu Wang

IPC: B22F9/02 ,  B22F1/05 ,  B22F3/16 ,  C22C33/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F1/057 ,  H01F41/02 ,  B22F9/04

CPC classification number: H01F1/057 ,  B22F1/05 ,  B22F3/16 ,  B22F9/023 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F41/0253 ,  B22F2009/044 ,  B22F2201/20 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2304/10 ,  B22F2998/10 ,  C22C2202/02

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.