Rare earth-iron system permanent magnet and process for producin

Details Rare earth-iron system permanent magnet and process for producin Rare earth-iron system permanent magnet and process for producin

1991-09-30

1993-05-25

Sheehan, John P.

Metal treatment

Stock

Magnetic

252 6254, H01F 1053

Patent

active

052136310

ABSTRACT:
A rare earth-iron permanent magnet which is formed from an ingot of an alloy composed of at least one rare earth element represented by R, Fe, B and Cu, by the hot working at 500.degree. C. or above which refines the crystal grains and make them magnetically anisotropic. A process for producing a rare earth-iron permanent magnet by subjecting the ingot of said alloy to hot working at 500.degree. C. or above. The permanent magnet is equal or superior in magnetic performance to conventional permanent magnets produced by sintering method. The process is simple and able to provides permanent magnets of low price and high performance. In addition, an isotropic rare earth-iron permanent magnet is obtained if said ingot undergoes heat treatment at 250.degree. C. or above.

REFERENCES:
patent: 4767474 (1988-08-01), Fujimura et al.
patent: 4773950 (1988-09-01), Fujimura et al.
patent: 4842656 (1989-06-01), Maines et al.
patent: 4902361 (1990-02-01), Lee et al.
patent: 4921553 (1990-05-01), Tokunaga et al.
patent: 4952239 (1990-08-01), Tokunaga et al.
patent: 4983232 (1991-01-01), Endoh et al.
patent: 5049208 (1991-09-01), Yajima et al.
Chemical Abstracts, Kononenko, et al., "Effect of Heat Treatment on the Coercive Force of Neodymium-Iron-Boron Alloyt Magents", vol. 104, No. 24, p. 705, Jun. 1986.

Affiliated with

Also associated with

Rating

Rare earth-iron system permanent magnet and process for producin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rare earth-iron system permanent magnet and process for producin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rare earth-iron system permanent magnet and process for producin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-894753