EP 0392077 A3 19910626 - MAGNETICALLY ANISOTROPIC HOT-WORKED MAGNETS AND COMPOSITION AND METHOD FOR THEIR PRODUCTION
Title (en)
MAGNETICALLY ANISOTROPIC HOT-WORKED MAGNETS AND COMPOSITION AND METHOD FOR THEIR PRODUCTION
Publication
Application
Priority
JP 9449389 A 19890414
Abstract (en)
[origin: EP0392077A2] Anisotropic hot-worked permanent magnets are made from an R-T-B alloy powder to which is added a combined internal lubricant including a carbon-based material such as graphite and a glass material such as a B2O3-SiO2-Bi2O3 type glass. 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.
IPC 1-7
IPC 8 full level
B22F 3/00 (2006.01); B22F 3/14 (2006.01); H01F 1/057 (2006.01); H01F 1/08 (2006.01); H01F 41/02 (2006.01)
CPC (source: EP)
B22F 3/14 (2013.01); H01F 1/0576 (2013.01)
Citation (search report)
- [YD] EP 0302598 A1 19890208 - GEN MOTORS CORP [US]
- [YD] EP 0195219 A2 19860924 - ENERGY CONVERSION DEVICES INC [US]
- [Y] EP 0255816 A2 19880210 - TREIBACHER CHEMISCHE WERKE AG [AT]
- [A] EP 0249973 A1 19871223 - TOKIN CORP [JP]
- [A] EP 0248665 A2 19871209 - SEIKO INSTR INC [JP]
- [A] DE 2815897 A1 19781109 - NIPPON MUSICAL INSTRUMENTS MFG
- [AD] WPIL, FILE SUPPLIER, accession no. 88-266468 [38], Derwent Publications Ltd, London, GB; & JP 63098105 A (MITSUBISHI METAL K.K.)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0392077 A2 19901017; EP 0392077 A3 19910626; EP 0392077 B1 19940831; DE 68917906 D1 19941006; DE 68917906 T2 19950105; JP 3047239 B2 20000529; JP H02272703 A 19901107
DOCDB simple family (application)
EP 89119269 A 19891017; DE 68917906 T 19891017; JP 9449389 A 19890414