Title:
FINE POWDER HEAT TREATMENT-BASED METHOD FOR MANUFACTURING RARE-EARTH MAGNET
Document Type and Number:
WIPO Patent Application WO/2014/101855
Kind Code:
A1
Abstract:
A fine powder heat treatment-based method for manufacturing a rare-earth magnet. A rare-earth magnet is crushed by using coarse alloy powders; fine powders are obtained by performing micro-grinding by using a jet milling; heat treatment is performed on the fine powders in a period longer than 6 minutes and shorter than 24 hours in a temperature of 100 to 1000 degrees centigrade in vacuum or inert gas; then, forming is performed by using a magnetic field forming method; sintering is performed in a temperature of 900 to 1140 degrees centigrade in vacuum or inert gas, so as to obtain a sintered body of the rare-earth magnet; the sintered body is treated to obtain the magnet; and then, RH grain boundary diffusion is performed in a temperature of 700 to 1020 degrees centigrade.
Inventors:
NAGATA HIROSHI (CN)
WU CHONGHU (CN)
WU CHONGHU (CN)
Application Number:
PCT/CN2013/090825
Publication Date:
July 03, 2014
Filing Date:
December 30, 2013
Export Citation:
Assignee:
XIAMEN TUNGSTEN CO LTD (CN)
International Classes:
H01F1/057; B22F1/00; B22F1/142; H01F1/08; H01F41/02
Foreign References:
| CN102586682A | 2012-07-18 | |||
| CN102274974A | 2011-12-14 | |||
| CN102103916A | 2011-06-22 | |||
| CN101238530A | 2008-08-06 | |||
| CN103050267A | 2013-04-17 |
Attorney, Agent or Firm:
SHOUCHUANG JUNHE PATENT AGENT CO., LTD. XIAMEN (CN)
厦门市首创君合专利事务所有限公司 (CN)
厦门市首创君合专利事务所有限公司 (CN)
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