NdFeB METHOD FOR PRODUCING NdFeB SYSTEM SINTERED MAGNET

摘要

the present invention, the grain boundary ( ) through the rare earth-rich phase (rich ) when used as a base material of the diffusion method, R _H is easy to spread, either substrate that the coercive force ( ) of its own to be a challenge to provide a method of manufacturing the high NdFeB sintered magnet. Hydrogen crushing process to produce the one trillion minutes by roughly crushing the NdFeB-based alloy ingot by having to occlude hydrogen in the NdFeB-based alloy ingot (step S1), and the fine pulverization to produce a fine powder by further grinding the one trillion minutes (step S2) and a charging step for charging the fine powder to the charging vessel (step S3) and, the orientation step of orienting while charging the fine powder to the charging vessel (step S4), and a fine powder after the orientation step charge to the charge container while the sintering process of sintering has the (step S5), not all perform the dehydrogenation heating and vacuum for leaving a, the hydrogen-absorption in the hydrogen crushing process, for each process to the alignment process from the hydrogen crushing process, the hydrogen crushing process carried out by the sintering process under oxygen-free atmosphere from. ;