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1. WO2016136705 - METHOD FOR MANUFACTURING R-T-B BASED SINTERED MAGNET

Publication Number WO/2016/136705
Publication Date 01.09.2016
International Application No. PCT/JP2016/055167
International Filing Date 23.02.2016
IPC
H01F 41/02 2006.01
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
H01F 1/057 2006.01
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
H01F 1/08 2006.01
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
06in the form of particles, e.g. powder
08pressed, sintered, or bound together
CPC
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 2009/049
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
049by pulverising at particular temperature
B22F 3/06
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
02Compacting only
06by centrifugal forces
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
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
C22C 2202/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
2202Physical properties
02Magnetic
Applicants
  • 日立金属株式会社 HITACHI METALS, LTD. [JP]/[JP]
Inventors
  • 山方 亮一 YAMAGATA Ryouichi
  • 國吉 太 KUNIYOSHI Futoshi
Agents
  • 奥田 誠司 OKUDA Seiji
Priority Data
2015-03779027.02.2015JP
2015-18977328.09.2015JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD FOR MANUFACTURING R-T-B BASED SINTERED MAGNET
(FR) PROCÉDÉ DE FABRICATION D’UN AIMANT FRITTÉ À BASE DE R-T-B
(JA) R-T-B系焼結磁石の製造方法
Abstract
(EN)
Disclosed is a method for manufacturing an R-T-B based sintered magnet, said method comprising: a step for preparing a plurality of starting materials of the R-T-B based sintered magnet (wherein R is at least one member of rare earth elements and essentially comprises Nd and/or Pr, and T is at least one member of transition metal elements and essentially comprises Fe); a step for preparing a plurality of alloy powder grains that contain 20-80 mass% inclusive of a heavy rare earth element RH (wherein the heavy rare earth element RH comprises Tb and/or Dy) and have a grain size of not more than 90 μm; a step for loading into a treatment container the aforesaid starting materials of the R-T-B based sintered magnet and 2-15 wt% inclusive, relative to the starting materials of the R-T-B based sintered magnet, of the aforesaid alloy powder grains; and a step for supplying and diffusing RH by heating and simultaneously rotating and/or oscillating the treatment container to thereby continuously or intermittently move the starting materials of the R-T-B based sintered magnet and the alloy powder grains.
(FR)
L'invention concerne un procédé de fabrication d'un aimant fritté à base de R-T-B, ledit procédé comprenant : une étape de préparation d'une pluralité de matériaux de départ de l'aimant fritté à base de R-T-B (R étant au moins un élément parmi les éléments de terres rares et comprenant essentiellement du Nd et/ou du Pr, et T étant au moins un élément parmi les éléments de métaux de transition et comprenant essentiellement du Fe) ; une étape de préparation d'une pluralité de grains de poudre d'alliage qui contiennent 20 à 80 % massiques inclus d'un élément de terre rare lourd RH (l'élément de terre rare lourd RH comprenant du Tb et/ou du Dy) et ayant une granulométrie n'excédant pas 90 µm ; une étape de chargement dans un récipient de traitement desdits matériaux de départ de l'aimant fritté à base de R-T-B et 2 à 15 % massiques inclus, par rapport aux matériaux de départ de l'aimant fritté à base de R-T-B, des grains de poudre d'alliage mentionnés précédemment ; et une étape de fourniture et de diffusion de RH par chauffage et rotation et/ou oscillation simultané du récipient de traitement pour ainsi déplacer continuellement ou par intermittence les matériaux de départ de l'aimant fritté à base de R-T-B et les grains de la poudre d'alliage.
(JA)
本開示のR-T-B系焼結磁石の製造方法は、複数個のR-T-B系焼結磁石素材(Rは希土類元素のうち少なくとも一種でありNd及び/又はPrを必ず含む、Tは遷移金属元素のうち少なくとも一種でありFeを必ず含む)を準備する工程と、重希土類元素RH(重希土類元素RHはTb及び/又はDy)を20質量%以上80質量%以下含有する、大きさが90μm以下の複数個の合金粉末粒子を準備する工程と、前記複数個のR-T-B系焼結磁石素材と、前記複数個のR-T-B系焼結磁石素材に対して重量比率で2%以上15%以下の前記複数個の合金粉末粒子とを処理容器内に装入する工程と、前記処理容器を加熱すると共に回転及び/又は揺動させることにより、前記R-T-B系焼結磁石素材と前記合金粉末粒子を連続的に又は断続的に移動させてRH供給拡散処理を行う工程とを含む。
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