Method and apparatus for producing magnetically anisotropic Nd-F

Details Method and apparatus for producing magnetically anisotropic Nd-F Method and apparatus for producing magnetically anisotropic Nd-F

1989-06-02

1991-01-15

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148104, 419 12, 419 49, H01F 102

Patent

active

049850865

ABSTRACT:
A method of producing a magnetically anisotropic Nd-Fe-B magnet material comprising 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 defined by a die having a hole extending therethrough, a lower plunger inserted into said hole, and an upper plunger 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.degree.-850.degree.; elevating the resulting pressed body by elevating said lower plunger while heating; and upsetting said pressed body while keeping a temperature thereof (upsetting temperature) at 600.degree.-850.degree. C. to provide it with magnetic anisotropy.

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