Method and apparatus for producing magnetically anisotropic Nd-Fe-B magnet material.

摘要

A method of producing a magnetically anisotropic Nd-Fe-B magnet material comprises the steps of: charging a green body produced by pressing a flaky or powdery material consisting of an amorphous alloy and/or a finely crystallized alloy, into a cavity (80) defined by a die (3) having a hole extending therethrough, a lower plunger (4) inserted into said hole; and an upper plunger (1) having a larger diameter than that of said hole; pressing said green body by elevating said lower plunger while keeping a temperature thereof (pressing temperature) at 600-850 DEG ; elevating the resulting pressed body by elevating said lower plunger (4) while heating; and upsetting said pressed body while keeping a temperature thereof (upsetting temperature) at 600-850 DEG C to provide it with magnetic anisotropy.