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1. (WO2018180891) METHOD FOR MANUFACTURING R-T-B-BASED SINTERED MAGNET
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Pub. No.: WO/2018/180891 International Application No.: PCT/JP2018/011416
Publication Date: 04.10.2018 International Filing Date: 22.03.2018
IPC:
H01F 41/02 (2006.01) ,B22F 1/00 (2006.01) ,B22F 3/00 (2006.01) ,C22C 38/00 (2006.01) ,H01F 1/057 (2006.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
41
Apparatus or processes specially adapted for manufacturing or assembling the devices covered by this subclass
02
for manufacturing cores, coils or magnets
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1
Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3
Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01
of inorganic materials
03
characterised by their coercivity
032
of hard-magnetic materials
04
metals or alloys
047
Alloys characterised by their composition
053
containing rare earth metals
055
and magnetic transition metals, e.g. SmCo5
057
and IIIa elements, e.g. Nd2Fe14B
Applicants:
日立金属株式会社 HITACHI METALS, LTD. [JP/JP]; 東京都港区港南一丁目2番70号 2-70, Konan 1-chome, Minato-ku, Tokyo 1088224, JP
Inventors:
石井 倫太郎 ISHII, Rintaro; JP
佐藤 鉄兵 SATOH, Teppei; JP
國吉 太 KUNIYOSHI, Futoshi; JP
Agent:
鮫島 睦 SAMEJIMA, Mutsumi; JP
山尾 憲人 YAMAO, Norihito; JP
Priority Data:
2017-06503529.03.2017JP
Title (EN) METHOD FOR MANUFACTURING R-T-B-BASED SINTERED MAGNET
(FR) PROCÉDÉ DE FABRICATION D'AIMANT FRITTÉ À BASE DE R-T-B
(JA) R-T-B系焼結磁石の製造方法
Abstract:
(EN) Provided is a method for manufacturing a R-T-B-based sintered magnet, the method comprising: a step for preparing an additive alloy powder containing 3.5-8.5 mass% of Co, 0.2-0.8 mass% of B, 33-69 mass% of R, 10-60 mass% of T, 0.8-3 mass% of Cu, and 1.8-10 mass% of Ga, and satisfying equation (1) below; a step for preparing a main alloy powder containing 0.91-1.1 mass% of B, 28.5-33 mass% of R, 64-70 mass% of T, and 0.1-0.4 mass% of Ga; a step for preparing a mixed-alloy powder containing 1-16 mass% of the additive alloy powder and 82-99 mass% of the main alloy powder; a step for molding the mixed-alloy powder to obtain a molded body; a step for sintering the molded body to obtain a sintered body; and a step for heat-treating the sintered body. (1) 14×[B]/10.8≤[T]/55.85≤14×[B]/10.8×2, [B] and [T] are the contents (mass%) of B and T in the additive alloy powder.
(FR) L'invention concerne un procédé de fabrication d'un aimant fritté à base de R-T-B, le procédé comprenant : une étape de préparation d'une poudre d'alliage d'additif contenant de 3,5 à 8,5 % en masse de Co, 0,2 à 0,8 % en masse de B, 33 à 69 % en masse de R, 10 à 60 % en masse de T, 0,8 à 3 % en masse de Cu, et 1,8 à 10 % en masse de Ga, et satisfaisant l'équation (1) ci-dessous ; une étape de préparation d'une poudre d'alliage principal contenant 0,91 à 1,1 % en masse de B, 28,5 à 33 % en masse de R, 64 à 70 % en masse de T, et 0,1 à 0,4 % en masse de Ga ; une étape de préparation d'une poudre d'alliage mixte contenant 1 à 16 % en masse de la poudre d'alliage d'additif et 82 à 99 % en masse de la poudre d'alliage principal ; une étape de moulage de la poudre d'alliage mixte afin d'obtenir un corps moulé ; une étape de frittage du corps moulé afin d'obtenir un corps fritté ; et une étape de traitement thermique du corps fritté. (1) 14 × [B]/10,8 ≤ [T]/55,85 ≤ 14 × [B]/10,8 × 2, [B] et [T] sont les teneurs (% en masse) de B et T dans la poudre d'alliage d'additif.
(JA) Co:3.5~8.5質量%、B:0.2~0.8質量%、R:33~69質量%、T:10~60質量%、Cu:0.8~3質量%、Ga:1.8~10質量%を含み、下記(1)を満足する添加合金粉末を準備する工程、B:0.91~1.1質量%、R:28.5~33質量%、T:64~70質量%、Ga:0.1~0.4質量%を含む主合金粉末を準備する工程、添加合金粉末1~16質量%と主合金粉末82~99質量%を含む混合合金粉末を準備する工程、混合合金粉末を成形して成形体を得る工程、成形体を焼結して焼結体を得る工程および焼結体を熱処理する工程を含むR-T-B系焼結磁石の製造方法である。 14×[B]/10.8≦[T]/55.85≦14×[B]/10.8×2・・・(1) [B]、[T]は添加合金粉末中のB、Tの含有量(質量%)である。
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African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)