SC工艺制备Sm2Co17型永磁材料的金相组织与磁性能

Metallographic Microstructure and Magnetic Properties of Sm2Co17 Rare Earth Permanent Magnet Material by a Strip Casting Technique

摘要:

采用SC工艺和通用的熔炼工艺制备了Sm2Co17型永磁材料。对两种工艺所制备的合金金相组织、永磁材料的磁性能进行了研究。另外，也研究了合金时效处理对永磁材料磁性能和取向度的影响。结果表明，SC工艺制备的合金获得了希望的柱状晶结构，但其制备的永磁材料磁性能却明显偏低，取向度只有通用熔炼工艺的74%；时效处理能明显提高SC工艺制备的永磁材料的磁性能，且其磁性能与通用熔炼工艺制备的永磁材料相当。

Abstract:

Sm2Co17 rare earth permanent magnets were prepared by a strip casting (SC) technique and general melting process, respectively. Metallographic microstructure and magnetic properties of the permanent magnets prepared by the two techniques were studied. In addition, the effect of aging treatment on the magnetic properties and the degree of orientation of the permanent magnets was studied. The results show that the columnar crystal structure as expected has been obtained from alloys prepared by the strip casting technique. But the magnetic properties of the permanent magnet are obviously lower, and the degree of orientation is 74% as prepared with general melting process. Aging treatment can greatly improve the magnetic properties of magnetic materials by strip casting, and the magnetic properties are similar to that of the permanent magnet prepared by general melting process.