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1. WO2018062174 - METHOD OF PRODUCING R-T-B SINTERED MAGNET

Publication Number WO/2018/062174
Publication Date 05.04.2018
International Application No. PCT/JP2017/034730
International Filing Date 26.09.2017
IPC
H01F 41/02 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
41Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
02for manufacturing cores, coils or magnets
B22F 1/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
B22F 3/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
B22F 3/24 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
24After-treatment of workpieces or articles
C21D 6/00 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
6Heat treatment of ferrous alloys
C22C 28/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
28Alloys based on a metal not provided for in groups C22C5/-C22C27/103
CPC
B22F 1/00
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
B22F 1/05
B22F 2003/248
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
24After-treatment of workpieces or articles
248Thermal after-treatment
B22F 2201/10
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2201Treatment under specific atmosphere
10Inert gases
B22F 2201/20
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2201Treatment under specific atmosphere
20Use of vacuum
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
Applicants
  • 日立金属株式会社 HITACHI METALS, LTD. [JP]/[JP]
Inventors
  • 國吉 太 KUNIYOSHI Futoshi
  • 三野 修嗣 MINO Shuji
Agents
  • 奥田 誠司 OKUDA Seiji
Priority Data
2016-19066929.09.2016JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD OF PRODUCING R-T-B SINTERED MAGNET
(FR) PROCÉDÉ DE PRODUCTION D'AIMANT FRITTÉ R-T-B
(JA) R-T-B系焼結磁石の製造方法
Abstract
(EN) This invention includes: an application step for applying an adhesive to an application region of the surface of an R-T-B sintered magnet material; an adhesion step for causing a granularity adjustment powder formed from a powder of a compound or an alloy of a Pr-Ga alloy, which is Dy and/or Tb, to adhere to the application region of the surface of the R-T-B sintered magnet material; and a diffusion step for performing a heat treatment at a temperature equal to or less than the sintering temperature of the R-T-B sintered magnet material and causing the Pr-Ga alloy contained in the granularity adjustment powder to be diffused from the surface of the R-T-B sintered magnet material to the interior. The granularity of the granularity adjustment powder is set so that the amount of Ga contained in the granularity adjustment powder is in a range of 0.10-1.0% by mass in relation to the R-T-B sintered magnet material when the powder particles constituting the granularity adjustment powder are disposed across the entire surface of the R-T-B sintered magnet material to form one to three particle layers.
(FR) La présente invention comprend : une étape d'application consistant à appliquer un adhésif sur une région d'application de la surface d'un aimant fritté R-T-B; une étape d'adhérence pour amener une poudre de réglage de granularité formée à partir d'une poudre d'un composé ou d'un alliage de l'alliage Pr-Ga, qui est Dy et/ou Tb, pour adhérer à la région d'application de la surface du materiau d'aimant fritté R-T-B; et une étape de diffusion pour effectuer un traitement thermique à une température égale ou inférieure à la température de frittage du materiau d'aimant fritté R-T-B et amener l'alliage Pr-Ga contenu dans la poudre de réglage de granularité à être diffusé depuis la surface du matériau d'aimant fritté R-T-B vers l'intérieur. La granularité de la poudre de réglage de granularité est réglée de telle sorte que la quantité de Ga contenue dans la poudre de réglage de granularité est dans une plage de 0,10 à 1,0 % en masse par rapport au materiau d'aimant fritté R-T-B lorsque les particules de poudre constituant la poudre de réglage de granularité sont disposées sur toute la surface du matériau d'aimant fritté R-T-B pour former une à trois couches de particules.
(JA) R-T-B系焼結磁石素材の表面の塗布領域に粘着剤を塗布する塗布工程と、Dy及びTbの少なくとも一方であるPr-Ga合金の合金又は化合物の粉末から形成した粒度調整粉末をR-T-B系焼結磁石素材の表面の塗布領域に付着させる付着工程と、R-T-B系焼結磁石素材の焼結温度以下の温度で熱処理して、粒度調整粉末に含まれるPr-Ga合金をR-T-B系焼結磁石素材の表面から内部に拡散する拡散工程とを含む。粒度調整粉末の粒度は、粒度調整粉末を構成する粉末粒子がR-T-B系焼結磁石素材の表面の全体に配置されて1層以上3層以下の粒子層を形成したときに、粒度調整粉末に含まれるGaの量が前記R-T-B系焼結磁石素材に対して質量比で0.10~1.0%の範囲内になるように設定される。
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