采用模压成型方法制备各向异性粘结NdFeB磁体, 并研究了其经交流退磁及热退磁后磁体的表面剩磁大小对磁粉吸附程度的影响.考察了分别以环氧树脂(epoxy resin)和聚四氟乙烯(PTFE)为粘结剂时, 其对各向异性粘结NdFeB的热退磁效果、尺寸精度、磁性能和力学性能的影响.通过试验发现, 以聚四氟乙烯为粘结剂的磁体在取向成型后能够在高于NdFeB合金居里点(312 ℃)的温度(360～380 ℃)进行热退磁处理, 达到良好的热退磁效果, 使得磁体的表面剩磁降低到5 mT以下, 以满足磁体表面防腐处理和尺寸精度的要求.
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