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1. WO2018143229 - METHOD FOR PRODUCING R-T-B SINTERED MAGNET

Publication Number WO/2018/143229
Publication Date 09.08.2018
International Application No. PCT/JP2018/003088
International Filing Date 31.01.2018
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
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
C22C 33/02 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
02by powder metallurgy
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 3/00
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
B22F 3/24
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
C22C 38/002
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
002containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
C22C 38/005
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
005containing rare earths, i.e. Sc, Y, Lanthanides
C22C 38/10
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
10containing cobalt
Applicants
  • 日立金属株式会社 HITACHI METALS, LTD. [JP]/[JP]
Inventors
  • 國吉 太 KUNIYOSHI Futoshi
Agents
  • 奥田 誠司 OKUDA Seiji
Priority Data
2017-01539431.01.2017JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD FOR 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) In this method for producing an R-T-B sintered magnet, an R-T-B sintered magnet material, an RH compound (at least one compound selected from among an RH fluoride, an RH oxide, and an RH oxyfluoride), and an RL-Ga alloy are prepared. The sintered magnet material contains 27.5-35.0 mass% of R, 0.80-0.99 mass% of B, 0-0.8 mass% of Ga, 0-2 mass% of M (M is at least one of Cu, Al, Nb, and Zr), and 60 mass% or more of T. The following are performed in the method: a diffusion step in which at least part of the RH compound and at least part of the RL-Ga alloy are brought into contact with at least part of the surface of the sintered magnet material and the amount of RH included in the sintered magnet material is increased by 0.05-0.40 mass% by performing first heat treatment at a temperature of 700-950°C; and second heat treatment performed at a temperature that is in the range of 450-750°C and lower than the temperature of the first heat treatment.
(FR) Dans ce procédé de production d'un aimant fritté R-T-B, un matériau d'aimant fritté R-T-B, un composé RH (au moins un composé choisi parmi un fluorure RH, un oxyde RH, et un oxyfluorure RH), et un alliage RL-Ga sont préparés. Le matériau d'aimant fritté contient de 27,5 à 35,0 % en masse de R, de 0,80 à 0,99 % en masse de B, de 0 à 0,8 % en masse de Ga, de 0 à 2 % en masse de M (M est au moins un élément parmi Cu, Al, Nb et Zr), et 60 % en masse ou plus de T. Les étapes suivantes sont effectuées dans le procédé : une étape de diffusion au cours de laquelle au moins une partie du composé RH et au moins une partie de l'alliage RL-Ga sont mises en contact avec au moins une partie de la surface du matériau d'aimant fritté et la quantité de RH comprise dans le matériau d'aimant fritté est augmentée de 0,05 à 0,40 % en masse en effectuant un premier traitement thermique à une température de 700 à 950 °C ; et un second traitement thermique effectué à une température qui est dans la plage de 450 à 750 °C et inférieure à la température du premier traitement thermique.
(JA) R-T-B系焼結磁石素材、RH化合物(RHフッ化物、RH酸化物、RH酸フッ化物から選ばれる少なくとも一種)及びRL-Ga合金を準備する。焼結磁石素材は、R:27.5~35.0質量%、B:0.80~0.99質量%、Ga:0~0.8質量%、M:0~2質量%(MはCu、Al、Nb、Zrの少なくとも一種)、T:60質量%以上を含有する。焼結磁石素材表面の少なくとも一部にRH化合物の少なくとも一部及びRL-Ga合金の少なくとも一部を接触させ、700℃以上950℃以下の温度で第一の熱処理を実施することで焼結磁石素材に含有されるRH量を0.05質量%以上0.40質量%以下増加させる拡散工程と、450℃以上750℃以下の温度で前記第一の熱処理温度よりも低い温度で第二の熱処理を実施する。
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