一、引言在永磁材料中,目前产量最大和应用最广的铸造铝镍钴合金和铁氧体永磁体,以及新出现的稀土钴永磁合金,其共同的缺点,是机械性能不好,很脆,或者既脆且硬,只能研磨,不能进行其它方面的机械加工.因此,它们在应用上就受到一定的限制.虽然已经有一些可变形永磁合金,但其性能都不高(参看表1). I. Introduction In permanent magnetic materials, the current output of the most widely used cast Alnico and ferrite permanent magnets, as well as the new rare earth cobalt permanent magnet alloys, the common drawback is the mechanical properties are not good, Very brittle, or both brittle and hard, can only grind, can not be other aspects of mechanical processing.Therefore, they are subject to certain restrictions.Although there are some deformable permanent magnet alloys, but its performance is not high See Table 1).