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METHOD OF MANUFACTURING RARE EARTH BASED ALLOY POWDER FOR PERMANENT MAGNET, MATERIAL ALLOY OF INTERMEDIATE PRODUCT OF THE POWDER AND MANUFACTURING METHOD THEREFOR
METHOD OF MANUFACTURING RARE EARTH BASED ALLOY POWDER FOR PERMANENT MAGNET, MATERIAL ALLOY OF INTERMEDIATE PRODUCT OF THE POWDER AND MANUFACTURING METHOD THEREFOR
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机译:永磁体稀土基合金粉末的制备方法,粉末中间产物材料合金及其制备方法
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摘要
PROBLEM TO BE SOLVED: To provide a method which industrially mass produces rare earth based alloy powder for a permanent magnet, where a rare earth based bonded magnet and a sintered magnet which have stable high coercive force and large remanent magnetization can be obtained, when HDDR treatment of R-T-(M)-B material alloy is performed.;SOLUTION: By completing first dehydrogenation treatment under specified conditions, large coercive force can be obtained in a powder state, while large magnetization is maintained in a second dehydrogenation treatment, where a great deal of treatment is enabled. That is, a material alloy of the intermediate product which is obtained in the first treatment can be left as it is, and a great deal of the material alloy for the intermediate product can be treated at a time in the second treatment. Thereby an HDDR-treated powder having high magnetic characteristic can be obtained.;COPYRIGHT: (C)2001,JPO
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