Title:
METHOD FOR NITRIDING RARE-EARTH MAGNET, AND NITRIDED RARE-EARTH MAGNET
Document Type and Number:
WIPO Patent Application WO/2022/126949
Kind Code:
A1
Abstract:
A method for nitriding a rare-earth magnet, comprising: 1) vacuumizing, adding a nitrogen source into a reactor filled with the rare-earth magnet, and performing three-stage heating treatment to obtain a semi-finished product, the heating temperature of the three-stage heating treatment is increased stage by stage; and 2) raising the temperature of the semi-finished product to a first set temperature, then adjusting the temperature to a second set temperature, vacuumizing, introducing inert gas, and performing heat preservation at the second set temperature to obtain a nitrided rare-earth magnet, the second set temperature being lower than the first set temperature.
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Inventors:
SUN YONGYANG (CN)
LI JUNHUA (CN)
KONG JIAYUAN (CN)
LI YUPING (CN)
HAN XIANGHUA (CN)
CHEN WENHONG (CN)
LI JUNHUA (CN)
KONG JIAYUAN (CN)
LI YUPING (CN)
HAN XIANGHUA (CN)
CHEN WENHONG (CN)
Application Number:
PCT/CN2021/088065
Publication Date:
June 23, 2022
Filing Date:
April 19, 2021
Export Citation:
Assignee:
HENGDIAN GROUP DMEGC MAGNETICS CO LTD (CN)
International Classes:
H01F1/053; B22F1/00; B22F9/04; C23C8/26; H01F1/059
Foreign References:
| CN104384493A | 2015-03-04 | |||
| CN107507687A | 2017-12-22 | |||
| CN106960712A | 2017-07-18 | |||
| CN102468028A | 2012-05-23 | |||
| EP1993110A1 | 2008-11-19 | |||
| US6383406B1 | 2002-05-07 | |||
| CN101699578A | 2010-04-28 | |||
| CN107557551A | 2018-01-09 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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