Research of warm compaction technology on nylon bonded Nd-Fe-B magnets
来源期刊：Acta Metallurgica Sinica2009年第3期
论文作者：Xiuhai ZHANG Dameng YE Jun QU Zhenhua YAO Weihao XIONG
Key words：Bonded Nd-Fe-B magnets; Warm compaction molding; Magnetic properties; Mechanical properties;
Abstract: 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 ther-mosetting temperature could hardly affect the density of magnet. The mechanical properties of magnets were the best when the thermosetting temperature was 200 ℃.The Br, Hcb, and (BH)max of warm compaction magnet were higher than those of room compaction. When the warm compaction temperature and thermosetting tem-perature were invariable, the density of magnet increased with the increase of com-paction pressure, which resulted in the increase of Br, Hob, 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.
Xiuhai ZHANG1，Dameng YE1，Jun QU1，Zhenhua YAO1，Weihao XIONG1
(1.State Key Laboratory of Material Processing and Die & Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China)
Abstract: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 ther-mosetting temperature could hardly affect the density of magnet. The mechanical properties of magnets were the best when the thermosetting temperature was 200 ℃.The Br, Hcb, and (BH)max of warm compaction magnet were higher than those of room compaction. When the warm compaction temperature and thermosetting tem-perature were invariable, the density of magnet increased with the increase of com-paction pressure, which resulted in the increase of Br, Hob, 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.
Key words:Bonded Nd-Fe-B magnets; Warm compaction molding; Magnetic properties; Mechanical properties;
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