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1. (WO2013146073) PROCESS FOR PRODUCING SINTERED R-T-B MAGNET
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2013/146073 International Application No.: PCT/JP2013/055411
Publication Date: 03.10.2013 International Filing Date: 28.02.2013
IPC:
H01F 41/02 (2006.01) ,B22F 3/00 (2006.01) ,B22F 3/26 (2006.01) ,C22C 33/02 (2006.01) ,C22C 38/00 (2006.01) ,H01F 1/057 (2006.01) ,H01F 1/08 (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
3
Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
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
24
After-treatment of workpieces or articles
26
Impregnating
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
33
Making ferrous alloys
02
by powder metallurgy
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
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
06
in the form of particles, e.g. powder
08
pressed, sintered, or bound together
Applicants: HITACHI METALS, LTD.[JP/JP]; 2-1, Shibaura 1-chome, Minato-ku, Tokyo 1058614, JP
Inventors: OBATA Tohru; JP
Agent: OKUDA Seiji; OKUDA & ASSOCIATES, 10th Floor, Osaka Securities Exchange Bldg., 8-16, Kitahama 1-chome, Chuo-ku, Osaka-shi, Osaka 5410041, JP
Priority Data:
2012-07930530.03.2012JP
Title (EN) PROCESS FOR PRODUCING SINTERED R-T-B MAGNET
(FR) PROCÉDÉ DE FABRICATION D'UN AIMANT R-T-B FRITTÉ
(JA) R-T-B系焼結磁石の製造方法
Abstract:
(EN) A process that comprises a step in which an RH diffusion source and a sintered R-T-B magnet object are alternately placed through a flat-shaped holding member having openings to form a stack, a step in which the stack is placed in a treatment vessel, a step (A) in which an RH supply/diffusion treatment is conducted at an internal pressure of the treatment vessel of 2.0-50 Pa and an internal temperature thereof of 800-950ºC, and a step (B) in which an RH diffusion treatment is conducted at an internal pressure of the treatment vessel of 150 Pa to 2 kPa and an internal temperature thereof of 800-950ºC, and that includes a step in which the step (A) and the step (B) are alternately repeated twice or more.
(FR) L'invention concerne un procédé qui comprend une étape dans laquelle une source de diffusion RH et un objet aimant R-T-B fritté sont placés de façon alternée à travers un élément de support de forme plate ayant des ouvertures pour former un empilement, une étape dans laquelle l'empilement est placé dans un récipient de traitement, une étape (A) dans laquelle un traitement d'alimentation/diffusion RH est conduit à une pression interne du récipient de traitement de 2,0-50 Pa et à une température interne de celui-ci de 800-950°C, et une étape (B) dans laquelle un traitement de diffusion RH est conduit à une pression interne du récipient de traitement de 150 Pa à 2 kPa et à une température interne de celui-ci de 800-950°C, et qui comprend une étape dans laquelle l'étape (A) et l'étape (B) sont répétées de façon alternée deux fois ou plus.
(JA)  RH拡散源とR-T-B系焼結磁石体とを開口部を有する平板状の保持部材を介して交互に配置し、積層体を構成する工程と、前記積層体を処理容器内に配置する工程と、前記処理容器内の圧力を2.0Pa以上50Pa以下、温度を800℃以上950℃以下でRH供給拡散処理を行う工程(A)と、前記処理容器内の圧力を150Pa以上2kPa以下、温度を800℃以上950℃以下でRH拡散処理を行う工程(B)とを含み、前記工程(A)と前記工程(B)を交互に2回以上繰り返す工程とを含む。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, 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, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)