| 简介 |
A method for producing a rare earth magnet, which comprises : a step for preparing a hydrogenated powder which contains a plurality of hydrogenated particles that contain Nd, Fe, Cu and B and are hydrogenated in an atmosphere containing hydrogen at a temperature that is not less than the disproportionation temperature; a step for producing a powder compact by press molding the hydrogenated powder; a step for producing a dehydrogenated body by dehydrogenating the powder compact in an inert atmosphere or in a reduced pressure atmosphere at a temperature that is not less than the recombination temperature, said dehydrogenated body having a main phase of an Nd2Fe14B compound and an intergranular phase that is formed at the grain boundary of the main phase and contains Nd and Cu, while having a lower melting point than the main phase; and a step for recrystallizing the intergranular phase by melting the intergranular phase so that the intergranular phase reacts with the main phase. |
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