| 简介 |
PROBLEM TO BE SOLVED : To provide a method for manufacturing an R-Fe-B-based rare earth sintered magnet by which a sintered magnet having a high degree of orientation can be obtained using press forming.
SOLUTION : Fine powder of a first alloy having a composition consisting of 11-18 at.% of at least one rare earth element selected from the light rare earth elements, 4-12 at.% of an element A (boron or a boron-carbon mixture) and the balance an element T which is Fe or a mixture of Fe and another transition metal and trace additive elements M with inevitable impurities is mixed with fine powder of a second alloy having a composition consisting of 10-35 of at.% at least one rare earth element selected from the heavy rare earth elements, 0-10 at.% of the element A (boron or the boron-carbon mixture) and the balance the element T which is Fe or the mixture of Fe and another transition metal and the trace additive elements M with inevitable impurities, the resulting mixed powder is compacted while applying a reversal magnetic field as an orienting magnetic field, and then sintering is carried out.
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