Research of warm compaction technology on nylon bonded Nd-Fe-B magnets  

作　　者：Xiuhai ZHANG Weihao XIONG Dameng YE Jun QU Zhenhua YAO 

机构地区：[1]State Key Laboratory of Material Processing and Die ~z Mould Technoiogy, Huazhong University of Scienceand Technology, Wuhan 430074, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2009年第3期174-180,共7页金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.50074014)

摘　　要：Warm compaction and room temperature compaction were applied to prepare bonded Nd-Fe-B magnets. The results indicated that the density of magnet was determined by the compaction pressure and warm compaction temperature, whereas, the thermosetting temperature could hardly affect the density of magnet. The mechanical properties of magnets were the best when the thermosetting temperature was 200 ℃. The Br, Hob, and （BH）max of warm compaction magnet were higher than those of room compaction. When the warm compaction temperature and thermosetting temperature were invariable, the density of magnet increased with the increase of compaction pressure, which resulted in the increase of Br, Hcb, and （BH）max of magnet and the decrease of Hcj of magnet. When the warm compaction temperature and compaction pressure were invariable, the magnetic properties of magnets decreased with the increase of thermosetting temperature. The magnetic properties of warm compaction molding magnets were better than those of injection molding magnets.Warm compaction and room temperature compaction were applied to prepare bonded Nd-Fe-B magnets. The results indicated that the density of magnet was determined by the compaction pressure and warm compaction temperature, whereas, the thermosetting temperature could hardly affect the density of magnet. The mechanical properties of magnets were the best when the thermosetting temperature was 200 ℃. The Br, Hob, and （BH）max of warm compaction magnet were higher than those of room compaction. When the warm compaction temperature and thermosetting temperature were invariable, the density of magnet increased with the increase of compaction pressure, which resulted in the increase of Br, Hcb, and （BH）max of magnet and the decrease of Hcj of magnet. When the warm compaction temperature and compaction pressure were invariable, the magnetic properties of magnets decreased with the increase of thermosetting temperature. The magnetic properties of warm compaction molding magnets were better than those of injection molding magnets.

关 键 词：Bonded Nd-Fe-B magnets Warm compaction molding Magnetic properties Mechanical properties 

分 类 号：TF124.3[冶金工程—粉末冶金] TQ330.16[冶金工程—冶金物理化学]