JP2018107328A - 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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- JP2018107328A JP2018107328A JP2016253697A JP2016253697A JP2018107328A JP 2018107328 A JP2018107328 A JP 2018107328A JP 2016253697 A JP2016253697 A JP 2016253697A JP 2016253697 A JP2016253697 A JP 2016253697A JP 2018107328 A JP2018107328 A JP 2018107328A
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- earth magnet
- rare earth
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- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
- B22F3/164—Partial deformation or calibration
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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
- H01F41/0266—Moulding; Pressing
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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
- H01F41/0273—Imparting anisotropy
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
Abstract
Description
図1は本発明の希土類磁石の製造方法の第一のステップで使用する磁性粉末の製造方法を説明した模式図であり、図2は製造方法の第一のステップを説明した図であり、図4は製造方法の第二のステップを説明した図である。
本発明者等は、本発明の製造方法で製造された希土類磁石の磁気特性を検証する実験をおこなった。まず、以下の表1で示す二種の組成A,Bの急冷薄帯からなる磁性粉末を用いて、二種類の希土類磁石のテストピースを製作した。この製造に当たり、実施例は本発明の製造方法によるものであり、比較例は熱間塑性加工後に速やかに圧力解放しながら冷却する製造方法によるものである。
Claims (2)
- 希土類磁石用の磁性粉末を加圧成形して焼結体を製造する第一のステップ、
前記焼結体を塑性加工型内に配設し、該焼結体を所定の方向に加圧しながら該焼結体に磁気的異方性を与える据え込み加工からなる熱間塑性加工をおこなって希土類磁石前駆体を製造し、該希土類磁石前駆体に対して前記所定の方向に所定の圧力を付与した状態で冷却して希土類磁石を製造する第二のステップからなる、希土類磁石の製造方法。 - 前記所定の圧力は、前記熱間塑性加工の際の加圧荷重未満であって、かつ前記希土類磁石前駆体の膨張による抵抗荷重以上に設定されており、
前記冷却では、前記希土類磁石前駆体の液相成分が固化する温度以下になるまで前記所定の圧力を保持する、請求項1に記載の希土類磁石の製造方法。
Priority Applications (3)
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JP2016253697A JP6604321B2 (ja) | 2016-12-27 | 2016-12-27 | 希土類磁石の製造方法 |
CN201711187564.0A CN108242334B (zh) | 2016-12-27 | 2017-11-24 | 稀土磁铁的制造方法 |
US15/841,681 US10546688B2 (en) | 2016-12-27 | 2017-12-14 | Method for producing rare-earth magnet |
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JP2016253697A JP6604321B2 (ja) | 2016-12-27 | 2016-12-27 | 希土類磁石の製造方法 |
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JP2018107328A true JP2018107328A (ja) | 2018-07-05 |
JP6604321B2 JP6604321B2 (ja) | 2019-11-13 |
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JP2016253697A Active JP6604321B2 (ja) | 2016-12-27 | 2016-12-27 | 希土類磁石の製造方法 |
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US (1) | US10546688B2 (ja) |
JP (1) | JP6604321B2 (ja) |
CN (1) | CN108242334B (ja) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09260171A (ja) * | 1996-03-22 | 1997-10-03 | Seiko Epson Corp | 希土類永久磁石の製造方法 |
JP2002075715A (ja) * | 2000-09-01 | 2002-03-15 | Nissan Motor Co Ltd | 異方性バルク交換スプリング磁石およびその製造方法 |
WO2014010418A1 (ja) * | 2012-07-12 | 2014-01-16 | 日産自動車株式会社 | 焼結磁石の製造方法 |
JP2014502034A (ja) * | 2010-10-25 | 2014-01-23 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
JP2014082422A (ja) * | 2012-10-18 | 2014-05-08 | Toyota Motor Corp | 希土類磁石の製造方法 |
JP2014194958A (ja) * | 2011-06-21 | 2014-10-09 | Hitachi Ltd | 焼結磁石 |
JP2016029679A (ja) * | 2014-07-25 | 2016-03-03 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04134804A (ja) * | 1990-09-27 | 1992-05-08 | Seiko Epson Corp | 希土類永久磁石の製造方法 |
SE9003521D0 (sv) * | 1990-11-05 | 1990-11-05 | Sandvik Ab | High pressure isostatic densiffication process |
US6531090B2 (en) * | 2000-02-17 | 2003-03-11 | Sumitomo Special Metals Co., Ltd. | Method for producing powder compact and method for manufacturing magnet |
JP4134804B2 (ja) | 2003-04-23 | 2008-08-20 | 株式会社Inax | 擬石及び壁出隅 |
KR101311480B1 (ko) * | 2011-08-03 | 2013-11-13 | 한국생산기술연구원 | 마찰교반 접합툴용 텅스텐 카바이드 소결체 제조 방법 |
KR20150033423A (ko) * | 2013-09-24 | 2015-04-01 | 엘지전자 주식회사 | 열간가압성형 공정을 이용한 이방성 열간가압성형 자석의 제조방법 및 이 방법으로 제조된 열간가압성형 자석 |
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- 2016-12-27 JP JP2016253697A patent/JP6604321B2/ja active Active
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2017
- 2017-11-24 CN CN201711187564.0A patent/CN108242334B/zh active Active
- 2017-12-14 US US15/841,681 patent/US10546688B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09260171A (ja) * | 1996-03-22 | 1997-10-03 | Seiko Epson Corp | 希土類永久磁石の製造方法 |
JP2002075715A (ja) * | 2000-09-01 | 2002-03-15 | Nissan Motor Co Ltd | 異方性バルク交換スプリング磁石およびその製造方法 |
JP2014502034A (ja) * | 2010-10-25 | 2014-01-23 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
JP2014194958A (ja) * | 2011-06-21 | 2014-10-09 | Hitachi Ltd | 焼結磁石 |
WO2014010418A1 (ja) * | 2012-07-12 | 2014-01-16 | 日産自動車株式会社 | 焼結磁石の製造方法 |
JP2014082422A (ja) * | 2012-10-18 | 2014-05-08 | Toyota Motor Corp | 希土類磁石の製造方法 |
JP2016029679A (ja) * | 2014-07-25 | 2016-03-03 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
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Publication number | Publication date |
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JP6604321B2 (ja) | 2019-11-13 |
CN108242334A (zh) | 2018-07-03 |
US10546688B2 (en) | 2020-01-28 |
CN108242334B (zh) | 2020-04-28 |
US20180182542A1 (en) | 2018-06-28 |
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