Title:
HEAT TREATMENT-BASED METHODS FOR MANUFACTURING ALLOY POWDERS FOR RARE-EARTH MAGNET AND FOR MANUFACTURING RARE-EARTH MAGNET
Document Type and Number:
WIPO Patent Application WO/2014/101854
Kind Code:
A1
Abstract:
Disclosed are a heat treatment-based method for manufacturing alloy powders for a rare-earth magnet and a method for manufacturing the rare-earth magnet. A rare-earth magnet is crushed by using coarse alloy powders, and fine powders are obtained by performing micro-grinding by using a jet milling. The fine powders are obtained by performing heat treatment 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. A process of fine power heat treatment is added after the process of the micro-grinding of the jet milling and the shaping process in a magnetic field, so that a great change occurs on the sintering of powders, thereby achieving an objective of manufacturing a magnet with high coercivity, high squareness and high heat resistance.
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Inventors:
NAGATA HIROSHI (CN)
WU CHONGHU (CN)
WU CHONGHU (CN)
Application Number:
PCT/CN2013/090824
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 | |||
| 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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