JP6451656B2 - 希土類磁石の製造方法 - Google Patents
希土類磁石の製造方法 Download PDFInfo
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- JP6451656B2 JP6451656B2 JP2016014294A JP2016014294A JP6451656B2 JP 6451656 B2 JP6451656 B2 JP 6451656B2 JP 2016014294 A JP2016014294 A JP 2016014294A JP 2016014294 A JP2016014294 A JP 2016014294A JP 6451656 B2 JP6451656 B2 JP 6451656B2
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- rare earth
- earth magnet
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- sheet material
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- 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
- H01F1/0533—Alloys characterised by their composition containing rare earth metals in a bonding agent
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus 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
- H01F41/02—Apparatus 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 for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus 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 for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0293—Apparatus 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 for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
まず、図1で示すように、たとえば50kPa以下に減圧したArガス雰囲気の不図示の炉中で、単ロールによるメルトスピニング法により、合金インゴットを高周波溶解し、希土類磁石を与える組成の溶湯を銅ロールRに噴射して急冷薄帯B(急冷リボン)を製作し、これを粗粉砕して磁性粉末を製作する。
本発明者等は、改質合金の塗布重量のばらつきを検証する実験、および、改質合金の最大塗布厚さのムラを検証する実験をおこなった。
希土類磁石原料を所定量配合し、Arガス雰囲気中で溶解させた後、その溶湯をオリフィスからCrめっきを施したCu製の回転ロールに射出し、急冷して磁性粉末を製作した。製作した薄片を成形型に収容し、大気雰囲気中で成形して成形体を得た。成形体を別途の容積のインコネルの型内に収容し、大気雰囲気中で熱間加圧成形して焼結体を製作した。得られた焼結体を鍛造型に収容し、熱間塑性加工をおこなって希土類磁石前駆体を製作した。
不活性ガス中にてアクリル樹脂に70Nd-30Cuの粉末を体積比で50:50となるように加え、攪拌してスラリーを製作した。製作したスラリーに実施例と同様に製作した希土類磁石前駆体を浸漬させて希土類磁石前駆体の表面にスラリーを付着させ、熱処理して30mm×70mm×10mm(厚さ)の寸法で重量が159.6gの希土類磁石を製作した。
実施例および比較例における改質合金の塗布重量のばらつき3σの結果を図8に示す。
実施例および比較例における改質合金の最大塗布厚さのムラに関する結果を図9に示す。
Claims (1)
- 希土類磁石材料となる磁性粉末を加圧しながら焼結して焼結体を製造し、該焼結体に対して磁気異方性を付与する熱間塑性加工を実施して希土類磁石前駆体を製造する第1のステップ、
前記希土類磁石前駆体に改質合金を拡散浸透させて希土類磁石を製造する第2のステップからなる希土類磁石の製造方法において、
前記第2のステップでは、前記改質合金の合金粉末が熱可塑性樹脂内に分散されたシート材を用い、該シート材を希土類磁石前駆体の表面に密着させ、熱処理することで前記改質合金の拡散浸透をおこない、
前記シート材の製作方法は、希土類元素と遷移金属元素の合金粉末が熱可塑性樹脂内に分散されたブロック体を製作し、該ブロック体を伸展させて所定厚さの伸展体を製作し、該伸展体から希土類磁石前駆体における前記改質合金を拡散する表面の面積に切り出して前記シート材を製作する、希土類磁石の製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016014294A JP6451656B2 (ja) | 2016-01-28 | 2016-01-28 | 希土類磁石の製造方法 |
CN201710060660.2A CN107017069B (zh) | 2016-01-28 | 2017-01-25 | 制造稀土磁体的方法 |
US15/414,945 US20170221630A1 (en) | 2016-01-28 | 2017-01-25 | Method of manufacturing rare earth magnet |
Applications Claiming Priority (1)
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JP2016014294A JP6451656B2 (ja) | 2016-01-28 | 2016-01-28 | 希土類磁石の製造方法 |
Publications (2)
Publication Number | Publication Date |
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JP2017135274A JP2017135274A (ja) | 2017-08-03 |
JP6451656B2 true JP6451656B2 (ja) | 2019-01-16 |
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JP2016014294A Active JP6451656B2 (ja) | 2016-01-28 | 2016-01-28 | 希土類磁石の製造方法 |
Country Status (3)
Country | Link |
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US (1) | US20170221630A1 (ja) |
JP (1) | JP6451656B2 (ja) |
CN (1) | CN107017069B (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6443584B2 (ja) * | 2016-09-29 | 2018-12-26 | 日立金属株式会社 | R−t−b系焼結磁石の製造方法 |
US10658107B2 (en) * | 2016-10-12 | 2020-05-19 | Senju Metal Industry Co., Ltd. | Method of manufacturing permanent magnet |
CN108305773A (zh) * | 2017-12-25 | 2018-07-20 | 宁波韵升股份有限公司 | 一种制备高性能烧结钕铁硼磁体的方法 |
JP7251264B2 (ja) * | 2019-03-28 | 2023-04-04 | Tdk株式会社 | R‐t‐b系永久磁石の製造方法 |
JP7331470B2 (ja) * | 2019-06-04 | 2023-08-23 | Tdk株式会社 | R‐t‐b系永久磁石の製造方法 |
CN112768170B (zh) * | 2020-12-30 | 2022-11-01 | 烟台正海磁性材料股份有限公司 | 一种稀土永磁体及其制备方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2003085683A1 (fr) * | 2002-04-09 | 2003-10-16 | Aichi Steel Corporation | Aimant agglomere anisotrope de terre rare composite, compose pour un aimant agglomere anisotrope de terre rare composite, et procede de preparation de ce dernier |
JP2009302236A (ja) * | 2008-06-12 | 2009-12-24 | Hitachi Chem Co Ltd | 希土類磁石処理用フィルムおよびそれを用いた希土類磁石 |
WO2013061836A1 (ja) * | 2011-10-27 | 2013-05-02 | インターメタリックス株式会社 | NdFeB系焼結磁石の製造方法 |
JP2013197414A (ja) * | 2012-03-21 | 2013-09-30 | Toyota Motor Corp | 焼結体とその製造方法 |
JP2014086529A (ja) * | 2012-10-23 | 2014-05-12 | Toyota Motor Corp | 希土類焼結磁石とその製造方法 |
JP5870914B2 (ja) * | 2012-12-25 | 2016-03-01 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
EP3065149B1 (en) * | 2013-11-01 | 2020-05-20 | Toda Kogyo Corporation | Soft magnetic ferrite resin composition, soft magnetic ferrite resin composition molded body, and power transmission device for non-contact power supply system |
US10410776B2 (en) * | 2014-12-12 | 2019-09-10 | Hitachi Metals, Ltd. | Production method for R-T-B-based sintered magnet |
US10418171B2 (en) * | 2014-12-12 | 2019-09-17 | Hitachi Metals, Ltd. | Production method for R—T—B-based sintered magnet |
US10867729B2 (en) * | 2015-03-24 | 2020-12-15 | Nitto Denko Corporation | Method for producing sintered body that forms rare-earth permanent magnet and has non-parallel easy magnetization axis orientation |
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2016
- 2016-01-28 JP JP2016014294A patent/JP6451656B2/ja active Active
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2017
- 2017-01-25 CN CN201710060660.2A patent/CN107017069B/zh active Active
- 2017-01-25 US US15/414,945 patent/US20170221630A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
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CN107017069A (zh) | 2017-08-04 |
CN107017069B (zh) | 2019-03-08 |
JP2017135274A (ja) | 2017-08-03 |
US20170221630A1 (en) | 2017-08-03 |
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