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Nd-Fe-B 合金,除用粉末冶金方法制备外,也用快淬、热压工艺制成具有优异性能的各向异性永磁体.实验表明,快淬 Nd-Fe-B合金的热压致密体于700℃下模压,若断面收缩达50%,则 Nd_2Fe_(14)B 基相的微晶因其 C 轴平行于压制方向而具有强的择优取向.显然,高温模压是用快淬合金制备高性能磁体的关键工艺,应变诱导晶粒长大和晶粒取向均在高温模压过程中完成.为探索快淬、热压磁体各向异性的成因,进而确定最佳热压工艺,有必要研究合金机械性
Nd-Fe-B alloy, in addition to the preparation by powder metallurgy method, but also with fast quenching, hot pressing process has excellent performance of anisotropic permanent magnet experiments show that quenching Nd-Fe-B alloy hot compact The bulk of the Nd 2 Fe 14 B phase has a strong preferential orientation due to its C-axis parallel to the direction of compression, when it is molded at 700 ° C. If the cross-section shrinks by 50%, it is clear that high-temperature compression is achieved by rapid quenching The key process of high-performance magnets, strain-induced grain growth and grain orientation are completed in the high temperature molding process.To explore the cause of quenching, hot-pressing magnet anisotropy, and then determine the best hot pressing process, it is necessary to study the alloy Mechanical