微晶钕铁硼真空快淬设备及工艺研究

Research on Microstructure NdFeB Vacuum Rapidly Quench Equipment and Technology

本文结合国内外钕铁硼永磁材料的开发应用状况，采用熔体旋转萃取法，设计、制造并调试完成了一台 ＶＲＱ－１０Ｔ型真空快淬设备，合理地选择了工艺参数，得到了厚为 ２０～５０μｍ的 ＮｄＦｅＢ薄带，制备了最大磁能积（ＢＨ）ｍａｘ＝５１．７ｋＪ／ｍ３的ＮｄＦｅＢ粘结磁体．本文介绍了该设备各部件的结构特点，并通过对退磁曲线的测试和对Ｘ射线衍射图样的观察，分析了影响微晶 ＮｄＦｅＢ成带情况及粘结 ＮｄＦｅＢ磁体性能的各种因素。最后，我们得到结论．转轮表面线速度是影响磁性能的主要因素，微晶结构的ＮｄＦｅＢ粘结磁体性能最佳．

Combinning with the internal and external development of Nd-Fe-B permanent magnetic materials,we designed and manufactured a VRQ-10T Vacuum Rapidly Quench Equipment with the melt spinning extraction method, and chose the technologic parameters rationally in this paper; then we got the thin NdFeB ribbons (20-50 um thickness) and produced the NdFeB bonded magnets with the maximum energy product (BH)max=51.7kJ/m3 .By the design and experiment, we have introduced the technical and structural characteristics of the equipment and according to the demagnetization curves and x-ray diffraction patterns, we have analysed the major technologic parameters for producing the microstructure NdFeB ribbons and NdFeB bonded magnets. At last, we got the conclusions that the linear velocity of the wheel affects the magnetic properties mainly and microstructure magnets can get the best magnetic properties.