WO1999060580A1 - POUDRE DE CHARGE POUR AIMANT R-Fe-B ET PROCEDE DE PRODUCTION D'UN AIMANT R-Fe-B - Google Patents
POUDRE DE CHARGE POUR AIMANT R-Fe-B ET PROCEDE DE PRODUCTION D'UN AIMANT R-Fe-B Download PDFInfo
- Publication number
- WO1999060580A1 WO1999060580A1 PCT/JP1999/002560 JP9902560W WO9960580A1 WO 1999060580 A1 WO1999060580 A1 WO 1999060580A1 JP 9902560 W JP9902560 W JP 9902560W WO 9960580 A1 WO9960580 A1 WO 9960580A1
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- Prior art keywords
- powder
- magnet
- acid
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0433—Nickel- or cobalt-based alloys
- C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0573—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes obtained by reduction or by hydrogen decrepitation or embrittlement
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present invention relates to a method for producing an R-Fe-B sintered magnet, particularly a method for reclaiming magnet scrap, unnecessary and defective products to obtain an alloy powder for the magnet and an R-Fe-B magnet having excellent magnetic properties.
- Nd 2 Fei 4 B phase main phase alloy obtained by grinding unnecessary acid magnets or defective sintered magnets, washing them with acid, drying them, then washing them with a Ca reduction treatment, and removing Ca components.
- the present invention relates to a raw material powder for R-Fe-B-based magnets and a method for producing R-Fe-B-based magnets, which are obtained by adding a composition adjusting alloy powder to a powder to form a sintered magnet and obtain a sintered magnet having excellent magnet properties.
- an R-Fe-B based sintered magnet is composed of Nd 2 Fe 14 B phase as the main phase and R-rich and B-rich phases of the boundary phase, and the main phase Nd 2 Fe 14 Various studies and proposals have been made to increase the phase B.
- sintered R-Fe-B magnets may be out of dimension, cracked, or distorted during sintering or magnet assembly, resulting in a failure rate of about 10%, An obstacle to reduction.
- the oxygen and carbon components of impurities in the rejected product are mixed with Ca or Ca (OH) 2, and deoxidation and decarbonization are performed by the Ca reduction decarburization method (Japanese Patent Application Laid-Open No. Sho 58-049631) and a method of removing oxygen by heat treatment in a dehydrogenated atmosphere and then directly reducing with calcium to remove oxygen (Japanese Patent Application Laid-Open No. 61-153201) are proposed. Have been.
- Each of the melting methods substantially regenerates into an alloying raw material, and does not effectively utilize the structure of the sintered magnet for improving the magnetic properties, particularly the main phase crystal grains as they are.
- the method for regenerating unnecessary and defective rare earth magnets by Ca reduction targets abrasive powder, small pieces, and aggregates generated in the rare earth magnet manufacturing process, and practically targets SmCo magnet abrasive powder. It is assumed that. Disclosure of the invention
- the present invention solves various problems of a method of reclaiming scrap, unnecessary and defective products of a conventional R-Fe-B sintered magnet into the alloy powder for the magnet, and allows main phase crystal grains to remain as they are. Effective use, it is possible to regenerate more efficiently and recycle With the aim of providing a method of producing raw material powder for R-Fe-B-based magnets, which enables effective use of earth resources and environmental protection by using this raw material powder.
- the aim is to provide a manufacturing method for R-Fe-B magnets that can obtain Fe-B magnets.
- the present invention provides a regenerated alloy powder comprising almost only the main phase Nd 2 Fei 4 B phase as described above, for improving the sinterability of the reclaimed alloy powder and adjusting the magnet composition.
- the present invention provides a method for producing an R-Fe-B-based magnet, characterized in that the magnet can be easily provided.
- the pulverization of the sintered magnet body may be any of a known mechanical pulverization in an atmosphere of an inert gas such as N 2 gas or Ar gas or an H 2 pulverization method.
- the size of the obtained pulverized product is preferably 5 mm or less. More than 5mm when 0 2 component removal is sufficiently row pictorial undesirable.
- the acid cleaning treatment can be performed without grinding. It is also possible to mix and treat magnetic waste and crushed material.
- C component of the sintered magnet body 0 in 2 component removal and acid cleaning processes to be performed in order to ⁇ the R-rich phase and B Ritsuchi phase boundary phase, the acid solution is added and an aqueous acetic acid solution
- the pH in an acid solution is preferably 2.0 to 5.0.
- Ca or Ca (OH) 2 is added to the treated powder. Mix and reduce.
- the amount of Ca or Ca (OH) 2 to be added and mixed is preferably 1.1 to 4.0 times the stoichiometric amount required for the reduction of rare earth oxides, and the temperature during reduction is 900 ° C to 1200 ° C, time Is preferably 1 to 5 hours.
- the wet cleaning method for removing the Ca component after the Ca reduction treatment is preferably performed using a dilute acid such as deionized water, and the pH of the cleaning condition is preferably 11 or less.
- the raw material powder regenerated by pulverizing the sintered magnet body, performing an acid cleaning treatment, a Ca reduction treatment, and a wet cleaning treatment is mostly composed of only the main phase Nd 2 Fe 14 B phase.
- the R-Fe-B magnet raw material powder having the required composition by using the regenerated raw material powder in order to improve the sinterability of the regenerated powder and adjust the composition, R13at% to 45at%, B12at% or less, balance Add alloy powder for adjustment whose composition is mainly composed of Fe.
- the mixing ratio between the regenerated raw material powder and the composition adjusting powder is the mixing ratio between the regenerated raw material powder and the composition adjusting powder
- 10 wt% to 90 wt% The reason for limiting to 90 wt% to 10 wt% is that when the regenerated powder is less than 10 wt% and the composition adjusting powder exceeds 90 wt%, the usage efficiency and magnetic properties of the regenerated powder are improved. If the content of the regenerated powder exceeds 90 wt% and the content of the powder for adjusting composition is less than 10 wt%, the liquid phase during sintering is insufficient, and the density after sintering is insufficient, which is not preferable.
- the R-Fe-B-based composition adjusting powder is prepared by dissolving the required R-Fe-B-based alloy and pulverizing it after production, melting and pulverization, direct reduction and diffusion method to obtain powder directly by Ca reduction, required R Dissolve R-Fe-B alloy using jet caster to obtain ribbon foil and pulverize it.Quenching alloy method of annealing, gas atomization method of melting required R-Fe-B alloy, pulverizing it with gas atomizing and heat-treating.
- the mechanical alloying method in which the required raw metal is powdered, then finely pulverized by mechanical poring and heat-treated, and the required R-Fe-B alloy is heated and decomposed and recrystallized in hydrogen ( Isotropic and anisotropic powders obtained by various manufacturing methods such as HDDR method can be used.
- the rare-earth element R in the regenerated R-Fe-B-based magnet raw material powder and the composition adjustment powder is at least one of Nd, Pr, Dy, Ho, and Tb, or 1 1, ⁇ 6, 8111, 0 (1, £ 1 ", £ 11/1 1 111, ⁇ 1) Preferably contains at least one of the peaks 11, ⁇ .
- Recycled raw material for R-Fe-B magnet The R of the powder preferably accounts for 11 to 13 atomic% of the composition.
- the rare earth element R in the composition adjusting powder preferably accounts for 13 to 45 atomic%. That is, if it is less than 13 atomic%, when producing a magnet by mixing with the main phase raw material, Liquid phase is not sufficiently developed, and if it exceeds 45 atomic%, the content of oxygen increases, which is not preferable.
- the R for the composition adjustment powder usually one kind of R is sufficient, but in practice, a mixture of two or more kinds (mish metal, dymium, etc.) can be used for convenience and other reasons. .
- R may not be a pure rare earth element, and may contain impurities which are unavoidable in production as far as industrially available.
- R is an essential element, and if less than 10 atomic%, the crystal structure becomes the same cubic structure as ⁇ -iron, so that high magnetic properties, especially A high coercive force cannot be obtained, and if it exceeds 30 atomic%, the R-rich non-magnetic phase increases and the residual magnetic flux density (Br) decreases, so that a permanent magnet with excellent characteristics cannot be obtained.
- B is an essential element in the magnet. If it is less than 2 atomic%, the rhombohedral structure becomes the main phase, and high coercive force (iHc) cannot be obtained. If it exceeds 28 atomic%, a B-rich non-magnetic phase becomes Many permanent magnets cannot be obtained because the residual magnetic flux density (Br) decreases. Therefore, B is desirably in the range of 2 to 28 atomic%.
- B exceeds 12 atomic%, an excess of B rich phase and Fe-B phase other than the R 2 Fe 14 B phase is present, so that B is 12 at% or less.
- a range is preferred.
- Fe is an essential element in the above magnets. If it is less than 65 atomic%, the residual magnetic flux density (Br) decreases, and if it exceeds 80 atomic%, a high coercive force cannot be obtained. % Is desirable.
- substituting part of Fe with Co can improve the temperature characteristics without impairing the magnetic properties of the obtained magnet, but when the Co substitution amount exceeds 20% of Fe, This is not preferable because the magnetic properties deteriorate.
- substitution amount of Co is 5 atomic% to 15 atomic% in the total amount of Fe and Co, (Br) increases as compared with the case where no substitution is made, so that it is preferable to obtain a high magnetic flux density.
- a part of B is less than 4.0 wt% C, less than 2.0 wt% P, less than 2.0 wt% S, 2.0wt%
- the upper limit of the addition amount is desirably in a range that satisfies the conditions necessary for setting the (BH) max and (Br) values of the magnet to required values.
- composition of the obtained reclaimed powder was as follows: Ndll.5 atomic%, B6.5 atomic%, Fe81.0 atomic%>, Col.O atomic%, microstructure (iNd2Fel4 phase was 99.5%.
- Example 1 500 g of the reclaimed powder obtained in Example 1 was mixed with a powder for composition adjustment comprising Ndl 6.5 atom%, B 6.5 atom%, and the balance Fe obtained by the ingot pulverization method. After mixing and mixing 500 g of the powder, a finely pulverized powder having an average particle size of about 3 ⁇ was obtained by pulverizing with a jet miso.
- the magnetic properties of the obtained magnet were Brl 2.8 kOe, iHcl 4.1 kOe, and (BH) max was 40.3 MGOe.
- the R-Fe-B based sintered magnet body which has become an inferior product due to unnecessary products, out of dimensions, cracks, or distortion, is pulverized, washed with an acid, dried, and further subjected to a Ca reduction treatment to be cleaned.
- a Ca reduction treatment to be cleaned.
- the material alloy powder consisting of the main phase system of Nd 2 Fe u B phase, which contributes most to the magnet properties, and sinter it to this main phase system material alloy powder.
- a composition adjusting alloy powder for improving the properties and adjusting the composition to form a sintered magnet a sintered magnet having excellent magnet properties can be easily manufactured.
- since magnets can be recycled from each specific product, effective use of earth resources and environmental protection can be achieved.
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- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Hard Magnetic Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69915025T DE69915025T2 (de) | 1998-05-18 | 1999-05-18 | Einsatzpulver für r-fe-b magnet und verfahren zur herstellung eines solchen magneten |
US09/462,902 US6149861A (en) | 1998-05-18 | 1999-05-18 | Methods for manufacturing R-Fe-B type magnet raw material powder and R-Fe-B type magnet |
EP19990919624 EP1026706B1 (en) | 1998-05-18 | 1999-05-18 | FEEDSTOCK POWDER FOR R-Fe-B MAGNET AND PROCESS FOR PRODUCING R-Fe-B MAGNET |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/153850 | 1998-05-18 | ||
JP15385098A JPH11329811A (ja) | 1998-05-18 | 1998-05-18 | R−Fe−B系磁石用原料粉末並びにR−Fe−B系磁石の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999060580A1 true WO1999060580A1 (fr) | 1999-11-25 |
Family
ID=15571476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/002560 WO1999060580A1 (fr) | 1998-05-18 | 1999-05-18 | POUDRE DE CHARGE POUR AIMANT R-Fe-B ET PROCEDE DE PRODUCTION D'UN AIMANT R-Fe-B |
Country Status (6)
Country | Link |
---|---|
US (1) | US6149861A (ja) |
EP (1) | EP1026706B1 (ja) |
JP (1) | JPH11329811A (ja) |
CN (1) | CN1125472C (ja) |
DE (1) | DE69915025T2 (ja) |
WO (1) | WO1999060580A1 (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100582167B1 (ko) * | 1999-12-13 | 2006-05-24 | 주식회사 포스코 | 롤 연마칩을 첨가한 퍼멀로이계 소결코아 제조방법 |
KR100374706B1 (ko) * | 2000-05-26 | 2003-03-04 | 한국기계연구원 | 네오디뮴-철-붕소계 초미립 합금분말 제조방법 |
DE10291720T5 (de) * | 2001-05-30 | 2004-08-05 | Sumitomo Special Metals Co., Ltd. | Verfahren zur Herstellung eines gesinterten Presslings für einen Seltenerdmetall-Magneten |
JP2002367846A (ja) * | 2001-06-12 | 2002-12-20 | Japan Science & Technology Corp | ラジアルまたは極異方性焼結磁石の製造方法 |
KR100853089B1 (ko) * | 2001-07-10 | 2008-08-19 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 희토류 자석 스크랩 및/또는 슬러지의 재용해 방법 및자석용 합금 및 희토류 소결 자석 |
JP4243461B2 (ja) * | 2002-08-06 | 2009-03-25 | 学校法人千葉工業大学 | 希土類金属の回収方法 |
DE10255604B4 (de) * | 2002-11-28 | 2006-06-14 | Vacuumschmelze Gmbh & Co. Kg | Verfahren zum Herstellen eines anisotropen Magnetpulvers und eines gebundenen anisotropen Magneten daraus |
JP4701917B2 (ja) * | 2005-08-22 | 2011-06-15 | パナソニック株式会社 | 多結晶集合型異方性粒子を含む複合磁石の再生方法 |
WO2009104632A1 (ja) * | 2008-02-20 | 2009-08-27 | 株式会社アルバック | スクラップ磁石の再生方法 |
JP2010215972A (ja) * | 2009-03-17 | 2010-09-30 | Toyota Motor Corp | NdFeBCu磁石材料 |
CN102101120A (zh) * | 2009-12-21 | 2011-06-22 | 上海爱普生磁性器件有限公司 | 粘结钕铁硼永磁体残次品的回用方法 |
CN103898400B (zh) * | 2012-12-31 | 2016-08-10 | 比亚迪股份有限公司 | 一种回收钕铁硼磁性材料的方法 |
US9044834B2 (en) | 2013-06-17 | 2015-06-02 | Urban Mining Technology Company | Magnet recycling to create Nd—Fe—B magnets with improved or restored magnetic performance |
US9336932B1 (en) | 2014-08-15 | 2016-05-10 | Urban Mining Company | Grain boundary engineering |
US10323299B2 (en) * | 2015-07-15 | 2019-06-18 | Iowa State University Research Foundation, Inc. | Recovering rare earth metals from magnet scrap |
JP6786910B2 (ja) * | 2016-06-30 | 2020-11-18 | 日立金属株式会社 | 軽希土類元素と重希土類元素を含む処理対象物から両者を分離する方法 |
DE102016216355A1 (de) | 2016-08-30 | 2018-03-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum Recycling von Permanentmagneten durch Schmelzen und Rascherstarren |
JP2021527961A (ja) * | 2018-06-18 | 2021-10-14 | アーベーベー・シュバイツ・アーゲーABB Schweiz AG | 磁性粉末の製造方法 |
KR102634865B1 (ko) * | 2019-08-02 | 2024-02-06 | 주식회사 엘지화학 | 자석 분말의 제조 방법 및 이에 의해 제조된 소결 자석 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61153201A (ja) * | 1984-12-27 | 1986-07-11 | Tdk Corp | 希土類磁石のスクラツプ再生方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58136728A (ja) * | 1982-02-08 | 1983-08-13 | Sumitomo Special Metals Co Ltd | 永久磁石材料の再生方法 |
JPS634028A (ja) * | 1986-06-23 | 1988-01-09 | Sumitomo Metal Mining Co Ltd | 希土類と鉄を含有するスクラツプの処理方法 |
GB2201426B (en) * | 1987-02-27 | 1990-05-30 | Philips Electronic Associated | Improved method for the manufacture of rare earth transition metal alloy magnets |
US4913745A (en) * | 1987-03-23 | 1990-04-03 | Tokin Corporation | Method for producing a rare earth metal-iron-boron anisotropic bonded magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
US5061106A (en) * | 1988-03-08 | 1991-10-29 | Colgate-Palmolive Company | Toothbrush with slow release of disinfectant and antibacterial agents and method of manufacturing the same |
ES2060869T3 (es) * | 1989-06-24 | 1994-12-01 | Frisetta Gmbh | Procedimiento y dispositivo para producir campos de cerdas o haces de cerdas. |
JPH11319752A (ja) * | 1998-05-12 | 1999-11-24 | Sumitomo Metal Mining Co Ltd | 希土類元素含有物からの有価組成物の回収方法、及びこれにより得られた合金粉末 |
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1998
- 1998-05-18 JP JP15385098A patent/JPH11329811A/ja active Pending
-
1999
- 1999-05-18 CN CN99800997A patent/CN1125472C/zh not_active Expired - Lifetime
- 1999-05-18 US US09/462,902 patent/US6149861A/en not_active Expired - Lifetime
- 1999-05-18 WO PCT/JP1999/002560 patent/WO1999060580A1/ja active IP Right Grant
- 1999-05-18 EP EP19990919624 patent/EP1026706B1/en not_active Expired - Lifetime
- 1999-05-18 DE DE69915025T patent/DE69915025T2/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61153201A (ja) * | 1984-12-27 | 1986-07-11 | Tdk Corp | 希土類磁石のスクラツプ再生方法 |
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Publication number | Publication date |
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EP1026706A1 (en) | 2000-08-09 |
JPH11329811A (ja) | 1999-11-30 |
EP1026706A4 (en) | 2003-05-07 |
CN1272946A (zh) | 2000-11-08 |
EP1026706B1 (en) | 2004-02-25 |
US6149861A (en) | 2000-11-21 |
DE69915025T2 (de) | 2004-09-16 |
CN1125472C (zh) | 2003-10-22 |
DE69915025D1 (de) | 2004-04-01 |
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