| 简介 |
PROBLEM TO BE SOLVED : To provide a rare earth permanent magnet that has superior magnetic characteristics because of a high volume ratio of magnet powder and also has superior characteristics with respect to strength and weather resistance, and a method of manufacturing the same.
SOLUTION : The method of manufacturing the rare earth permanent magnet includes at least : a compact forming process of forming a compact of 75 to 95% in volume ratio of rare earth-based quenched alloy powder to the whole by subjecting the rare earth-based quenched alloy powder to cold compression without using a resin binder; a resin impregnant impregnation process of impregnating the formed compact with a resin impregnant; a first heat treatment process of carrying out a heat treatment on the compact impregnated with the impregnant at 60 to 100°C; and a second heat treatment process of carrying out a heat treatment by raising the temperature up to 100 to 200°C at a temperature raising speed of ≤10°C/min after turning over the compact.
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