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1. WO2017054674 - COMPOSITE R-Fe-B SERIES RARE EARTH SINTERED MAGNET CONTAINING Pr AND W

Publication Number WO/2017/054674
Publication Date 06.04.2017
International Application No. PCT/CN2016/099861
International Filing Date 23.09.2016
IPC
H01F 1/057 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
04metals or alloys
047Alloys characterised by their composition
053containing rare earth metals
055and magnetic transition metals, e.g. SmCo5
057and IIIa elements, e.g. Nd2Fe14B
CPC
B22F 1/0011
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties
0003Metallic powders per se; Mixtures of metallic powders; Metallic powders mixed with a lubricating or binding agent
0007Metallic powder characterised by its shape or structure, e.g. fibre structure
0011Metallic powder characterised by size or surface area only
B22F 2301/355
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2301Metallic composition of the powder or its coating
35Iron
355Rare Earth - Fe intermetallic alloys
B22F 2304/10
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2304Physical aspects of the powder
10Micron size particles, i.e. above 1 micrometer up to 500 micrometer
B22F 2998/10
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2998Supplementary information concerning processes or compositions relating to powder metallurgy
10Processes characterised by the sequence of their steps
B22F 2999/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2999Aspects linked to processes or compositions used in powder metallurgy
B22F 9/04
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
04starting from solid material, e.g. by crushing, grinding or milling
Applicants
  • 厦门钨业股份有限公司 XIAMEN TUNGSTEN CO., LTD. [CN]/[CN]
Inventors
  • 永田浩 NAGATA, Hiroshi
Priority Data
201510625876.X28.09.2015CN
201610827760.918.09.2016CN
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) COMPOSITE R-Fe-B SERIES RARE EARTH SINTERED MAGNET CONTAINING Pr AND W
(FR) AIMANT FRITTÉ COMPOSITE DE TERRES RARES DE LA SÉRIE R-FE-B CONTENANT PR ET W
(ZH) 一种复合含有Pr和W的R-Fe-B系稀土烧结磁铁
Abstract
(EN) Disclosed is a composite R-Fe-B series rare earth sintered magnet containing Pr and W. The rare earth sintered magnet contains an R2Fe14B main phase, wherein R is a rare earth element at least comprising Pr and characterized in that the raw material composition thereof comprises at least 2 wt% of Pr and 0.0005 wt%-0.03 wt% of W. The rare earth sintered magnet is prepared by means of the following steps: a procedure of preparing a melt liquid of the raw material components as a quenched alloy; a procedure of crushing the quenched alloy into a fine powder; a procedure of obtaining a formed article from the fine powder using a magnetic field forming method; and a procedure of sintering the formed article. For the rare earth sintered magnet, the heat resistance and thermal demagnetizing property of the Pr magnet are improved by adding a trace amount of W.
(FR) L'invention concerne un aimant fritté composite de terres rares de la série R-Fe-B contenant Pr et W. L'aimant fritté de terres rares contient une phase principale R2Fe14B, R représentant un élément des terres rares comprenant au moins Pr et étant caractérisé en ce que la composition de matières premières de celui-ci comprend au moins 2 % en poids de Pr et 0,0005 % en poids à 0,03 % en poids de W. L'aimant fritté de terres rares est préparé par la mise en oeuvre des étapes suivantes : préparer un bain de fusion liquide des composants de matières premières sous la forme d'un alliage trempé; concasser l'alliage trempé pour produire une poudre fine; obtenir un article formé à partir de la poudre fine à l'aide d'un procédé de formation de champ magnétique; et fritter l'article formé. Pour cet aimant fritté de terres rares, on améliore les propriétés de résistance à la chaleur et de démagnétisation thermique de l'aimant de Pr en ajoutant une quantité trace de W.
(ZH) 本发明公开了一种复合含有Pr和W的R-Fe-B系稀土烧结磁铁,该稀土烧结磁铁含有R2Fe14B型主相,R为至少包括Pr的稀土元素,其特征在于,其原料成分包括2wt%以上的Pr和0.0005wt%~0.03wt%的W;所述稀土烧结磁铁包括如下的步骤制得:将所述原料成分的熔融液制备成急冷合金的工序;将所述急冷合金粉碎成细粉的工序;将所述细粉用磁场成形法获得成形体,对所述成形体进行烧结的工序。该稀土烧结磁铁通过加入微量的W,来改善含Pr磁铁的耐热性和热减磁性能。
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