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由机电工业部九所和西北工业大学共同研制的“可加工稀土钴永磁材料”于1988.12.24～25在西安西北工业大学通过了由航空航天工业部和机电工业部联合组织的技术鉴定。他们以磁学、结晶学和复合材料现代理论为指导,采用高梯度真空定向凝固技术,直接生产出的既有较高磁性能又有良好韧性的可加工稀土钴永磁体[(BH)m=18MGOe可进行车削、钻孔,可用内圆切割机切成厚为
The Machinable Rare-Earth Cobalt Permanent Magnetic Materials jointly developed by nine mechanical and electrical industry ministries and Northwestern Polytechnical University passed technical appraisals jointly organized by the aerospace industry department and the electromechanical industry department at Xi’an Northwestern Polytechnical University at 1988.12.24 ~ 25. Guided by the modern theories of magnetism, crystallography and composite materials, they adopt the high-gradient vacuum directional solidification technology to directly produce machinable rare earth cobalt permanent magnet with high magnetic properties and good toughness [(BH) m = 18MGOe can be turning, drilling, can be cut into thick with a circular cutter