EP 1082733 A1 20010314 - METHOD FOR PREPARING A MAGNETIC MATERIAL BY FORGING AND MAGNETIC MATERIAL IN POWDER FORM
Title (en)
METHOD FOR PREPARING A MAGNETIC MATERIAL BY FORGING AND MAGNETIC MATERIAL IN POWDER FORM
Title (de)
HERSTELLUNGSVERFAHREN FÜR EIN MAGNETMATERIAL DURCH SCHMIEDEN UND MAGNETMATERIAL IN PULVERFORM
Title (fr)
PROCEDE DE PREPARATION D'UN MATERIAU MAGNETIQUE PAR FORGEAGE ET MATERIAU MAGNETIQUE SOUS FORME DE POUDRE
Publication
Application
Priority
- FR 9901234 W 19990526
- FR 9806745 A 19980528
Abstract (en)
[origin: US6592682B1] The invention concerns a method for preparing a magnetic material by forging, characterised in that, in a first embodiment, it comprises the following steps; placing in a sheath an alloy based on at least one rare earth, at least one transition metal and at least one other element selected among boron and carbon; bringing the whole alloy to a temperature not less than 500° C.; forging the whole at a deformation speed of the material not less than 8 s-1. After forging, it is possible to subject the resulting product to at least one annealing and hydridation then dehydridation, in another embodiment, it consists in starting with an alloy based on at least one rare earth and one transition metal and proceeding as in the first embodiment. After forging and, optionally, annealing, hydridation and dehydridation treatments, the resulting material is subjected to nitriding. The invention also concerns a magnetic material in power form, characterised in that has a coercivity not less than 9 kOe and retentivity not less than 9 kG.
IPC 1-7
IPC 8 full level
C21D 8/12 (2006.01); C22C 38/00 (2006.01); H01F 1/053 (2006.01); H01F 1/057 (2006.01); H01F 1/058 (2006.01); H01F 1/059 (2006.01); H01F 1/06 (2006.01); H01F 1/08 (2006.01); H01F 41/02 (2006.01)
CPC (source: EP US)
H01F 1/0576 (2013.01 - EP US); H01F 1/058 (2013.01 - EP US); H01F 1/059 (2013.01 - EP US); H01F 41/0273 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE FI FR GB
DOCDB simple family (publication)
US 6592682 B1 20030715; AT E236450 T1 20030415; AU 3935399 A 19991213; CN 1142562 C 20040317; CN 1310849 A 20010829; DE 69906513 D1 20030508; DE 69906513 T2 20040219; EP 1082733 A1 20010314; EP 1082733 B1 20030402; FR 2779267 A1 19991203; FR 2779267 B1 20000811; JP 2002516925 A 20020611; JP 3668134 B2 20050706; TW 558469 B 20031021; WO 9962080 A1 19991202
DOCDB simple family (application)
US 70128601 A 20010608; AT 99922227 T 19990526; AU 3935399 A 19990526; CN 99808843 A 19990526; DE 69906513 T 19990526; EP 99922227 A 19990526; FR 9806745 A 19980528; FR 9901234 W 19990526; JP 2000551403 A 19990526; TW 88108853 A 19990726