Magnetically anisotropic hotworked magnet and method of producin

Details Magnetically anisotropic hotworked magnet and method of producin Magnetically anisotropic hotworked magnet and method of producin

1990-04-25

1991-06-25

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

252 6255, 148101, 148302, 75243, 75244, B22F 100

Patent

active

050264192

ABSTRACT:
Anisotropic hot-worked permanent magnets are made from an R-T-B alloyed powder to which is added a combination internal lubricant including a carbon-based material such as graphite and a glass material such as glass from the B.sub.2 O.sub.3 --SiO.sub.2 --BiO.sub.3 glass system. The internal lubricant provides improved formability during the hot-working step, such as die-upsetting, and provides finished magnet products wherein the individual grains are more uniformly plastically deformed throughout the product.

REFERENCES:
patent: 4385944 (1983-05-01), Hasegawa
patent: 4710236 (1987-12-01), Schultz
patent: 4780226 (1988-10-01), Sheets et al.
patent: 4915737 (1990-04-01), Morimoto et al.

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