EP 0775363 A1 19970528 - METHOD OF PRODUCING HARD MAGNETIC PARTS
Title (en)
METHOD OF PRODUCING HARD MAGNETIC PARTS
Title (de)
VERFAHREN ZUR HERSTELLUNG HARTMAGNETISCHER TEILE
Title (fr)
PROCEDE DE FABRICATION DE PARTIES MAGNETIQUES DURES
Publication
Application
Priority
- DE 19521218 A 19950614
- DE 19521221 A 19950614
- EP 9602379 W 19960601
Abstract (en)
[origin: US5733384A] PCT No. PCT/EP96/02379 Sec. 371 Date Feb. 11, 1997 Sec. 102(e) Date Feb. 11, 1997 PCT Filed Jun. 1, 1996 PCT Pub. No. WO97/00524 PCT Pub. Date Jan. 3, 1997A process is provided for a technologically controllable, economic production of hard-magnetic parts from Sm2-(Fe,M)17-Cy-base work materials with interstitial inclusions, where M designates gallium and/or at least one metallic element serving to stabilize a rhombohedral 2:17 structure. A Sm2Fe17-xMxCy powder mixture is produced, where x>0.1 and 3>/=y>/=0. The mixture is subjected to an intensive fine grinding process in a ball mill. The finely ground mixture is heat-treated in a temperature range from 650 DEG C. to 900 DEG C. for partial or complete recrystallization. The resulting ultra-fine-grain Sm2Fe17-xMxCy magnetic powder is compacted to produce magnet bodies by a hot pressing processing in a temperature range from 650 DEG C. to 900 DEG C. The process is applicable, for example, for the production of hard-magnetic parts based on interstitial Sm2Fe17Cy compounds.
IPC 1-7
IPC 8 full level
B22F 9/04 (2006.01); C22C 1/04 (2006.01); C22C 38/00 (2006.01); H01F 1/053 (2006.01); H01F 1/058 (2006.01)
CPC (source: EP US)
C22C 1/0441 (2013.01 - EP US); H01F 1/058 (2013.01 - EP US)
Citation (search report)
See references of WO 9700524A1
Designated contracting state (EPC)
AT DE FI FR GB NL
DOCDB simple family (publication)
US 5733384 A 19980331; EP 0775363 A1 19970528; JP H10504141 A 19980414; WO 9700524 A1 19970103
DOCDB simple family (application)
US 79315697 A 19970211; EP 9602379 W 19960601; EP 96918658 A 19960601; JP 50256297 A 19960601