METHOD FOR MANUFACTURING RFeB-BASED MAGNET AND ALLOY USED IN SAID METHOD FOR GRAIN BODY DIFFUSION PROCESS

The present application relates to a method for manufacturing an RFeB-based magnet, and to an alloy for a grain boundary diffusion process, the method comprising: a base material preparation step of preparing a base material made of a sintered body of an RFeB-based alloy or a thermally deformed body of an RFeB-based alloy; a deposit preparation step of preparing a deposit containing an RHdCu alloy containing Cu and a heavy rare earth element RHd to be diffused and having a Cu content of from 20% by mass to 40% by mass (inclusive); an attachment step for attaching the attachment material to the surface of the base material; and a heating step: heating the substrate attached with the attachment to a predetermined temperature at which the heavy rare earth element RHd to be diffused is diffused into the substrate through the grain boundary of the substrate. 本申请涉及一种用于制造RFeB系磁体的方法，并且涉及一种用于晶界扩散工艺的合金，上述方法包括：基材制备步骤，制备由RFeB系合金的烧结体或RFeB系合金的热变形体制成的基材；附着物制备步骤，制备包含RHdCu合金的附着物，RHdCu合金包含Cu和待扩散的重稀土元素RHd并且Cu的含量为20质量％以上40质量％以下；