Temper process of sintered Nd-Fe-B permanent magnet

Details Temper process of sintered Nd-Fe-B permanent magnet Temper process of sintered Nd-Fe-B permanent magnet

2005-12-09

2008-05-27

Sheehan, John P. (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S102000, C148S121000

Reexamination Certificate

active

07377985

ABSTRACT:
The present invention provides a tempering process for sintered Nd—Fe—B permanent magnet material, which optimizes the microstructure of the Nd—Fe—B magnet and improves intrinsic coercive force and its consistency by increasing the cooling rate after tempering. After heating to a temper temperature, the magnetic material is cooled in a cooling liquid within a cooling chamber into which a pressurized cooling gas is introduced.

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