JPWO2018088393A1 - 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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- 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
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- 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
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- B22F3/10—Sintering only
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- B22—CASTING; POWDER METALLURGY
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- B22F9/00—Making metallic powder or suspensions thereof
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- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- 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
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
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- 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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- 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
- H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2
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Abstract
Description
以下のように、コンピュータを用いたシミュレーションにより、実施例1の配向工程を模擬した。シミュレーションは有限要素法に基づく。シミュレーションには、COMSOL株式会社製のソフトウェアであるCOMSOL Multiphysicsを用いた。
3A,3B,3C,3D,3E,3F,3G,3H: アルゴン
5: ベークライト
6: アクリル樹脂
10: Nd2Fe14B
12A: 水(冷却水)
12B: 銅(空芯コイルを構成する銅線)
Nd2Fe14Bの比透磁率: 1.05
アルゴンの電気伝導率: 1.0×10−14S/m
アルゴンの比誘電率: 1.0005
アルゴンの比透磁率: 1
銅の電気伝導率: 5.8×107S/m
銅の比誘電率: 0.000001
銅の比透磁率: 0.9999
アクリル樹脂の電気伝導率: 1.0×10−14S/m
アクリル樹脂の比誘電率: 3.4
アクリル樹脂の比透磁率: 1
水の電気伝導率: 5.5×10−6S/m
水の比誘電率: 80
水の比透磁率: 0.9999
ベークライトの電気伝導率: 1.0×10−9S/m
ベークライトの比誘電率: 4.8
ベークライトの比透磁率: 1
E: 電圧(単位:V)
C: 静電容量(単位:F)
L: インダクタンス(単位:H)
R: 抵抗(単位:Ω)
t: 時間(単位:秒)
E: 2530V
C: 3600μF
L: 550μH
R: 50mΩ
G:合金粒子の体積
μ0:真空の透磁率
μa:実効透磁率(みかけの比透磁率)
h:合金粒子に作用する磁場
比較例1のシミュレーションでは、アクリル樹脂からなる側型6の代わりに、アルミニウム合金(A5052)からなる側型6を用いた。アルミニウム合金の電気伝導率は、2.0×107S/mであった。アルミニウム合金の比誘電率は1であった。アルミニウム合金の比透磁率は1であった。
図11及び図13は、側型6がアクリル樹脂から形成されることにより、側型6における渦電流の発生が抑制されることを示している。下記表1及び図14は、側型6がアクリル樹脂から形成されることにより、成形体10を構成する合金粒子を側型6の内壁へ引っ張る磁力(渦電流に起因する磁力)が抑制されることを示している。
ストリップキャスト法により、組成が重量分率でNd29Dy1Febal.B1であるフレーク状の合金を作製した。合金を水素吸蔵法により粗粉砕して、粗粉末を得た。粗粉末にオレイン酸アミド(潤滑剤)を添加した。続いて粗粉末を不活性ガス中でジェットミルにより粉砕して、微粉末(希土類元素を含む金属粉末)を得た。微粉末の粒子径D50は、4μmに調整した。微粉末中の酸素の含有量は、5000質量ppm以下であった。微粉末中の窒素の含有量は、500質量ppm以下であった。微粉末中の炭素の含有量は、1000質量ppm以下であった。
実施例3〜9、並びに比較例2及び3では、成形圧力を下記表2に示される値に調整した。実施例3〜9、並びに比較例2及び3では、型内へ供給する微粉末の質量及び成形圧力を変更することにより、成形工程直後の成形体の密度を、下記表2に示される値に調整した。実施例3〜9、並びに比較例2及び3其々の焼結工程直前の成形体の密度は、成形工程直後の成形体の密度(密度1)とほぼ同じであった。これらの事項以外は、実施例2と同様の方法で、実施例3〜9、並びに比較例2及び3其々の成形体及び希土類磁石を作製した。
比較例4〜6では、配向工程と焼結工程との間において、成形体を300℃で加熱しなかった。比較例4〜6では、配向工程後、成形体を上記の型から別のゴム型内へ移した。成形体を内包するゴム型を水中に設置して、ゴム型内の成形体を水圧によって等方的に圧縮した。以上のように、比較例4〜6では、300℃での加熱の代わりに、冷間静水圧プレス(Cold Isostatic Pressing)を実施した。下記表2では、冷間静水圧プレスを「CIP」と表記する。冷間静水圧プレスにおける水圧は、下記表2に示す値に調整した。冷間静水圧プレス後、成形体をゴム型から分離して、焼結用トレイ上に載置した。
Claims (5)
- 希土類元素を含む金属粉末を、型内へ供給して、成形体を形成する成形工程と、
前記型内に保持された前記成形体にパルス磁場を印加して、前記成形体に含まれる前記金属粉末を配向させる配向工程と、
前記配向工程後、前記型から分離された前記成形体を焼結させる焼結工程と、
を備え、
前記型の少なくとも一部が樹脂から形成されており、
密度が3.0g/cm3以上4.4g/cm3以下に調整された前記成形体を焼結させることを特徴とする、
希土類磁石の製造方法。 - 前記型が、下型と、下型の上に配置される筒状の側型と、前記側型の上方から前記側型内へ挿入される上型と、を含み、
前記下型、前記側型、及び前記上型のうち、少なくとも前記側型が前記樹脂から形成されている、
請求項1に記載の希土類磁石の製造方法。 - 前記樹脂が絶縁性樹脂である、
請求項1又は2に記載の希土類磁石の製造方法。 - 前記型が前記金属粉末に及ぼす圧力を、0.049MPa以上20MPa以下に調整する、
請求項1〜3のいずれか一項に記載の希土類磁石の製造方法。 - 前記配向工程では、同一の中心軸を持つように配置された少なくとも二つのコイルを用いて、前記成形体に前記パルス磁場を印加する、
請求項1〜4のいずれか一項に記載の希土類磁石の製造方法。
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PCT/JP2017/040098 WO2018088393A1 (ja) | 2016-11-09 | 2017-11-07 | 希土類磁石の製造方法 |
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CN110136916B (zh) | 2019-06-11 | 2021-01-26 | 深圳市瑞达美磁业有限公司 | 一种辐射取向实心圆柱状磁体及其生产方法及设备 |
CN110165847B (zh) * | 2019-06-11 | 2021-01-26 | 深圳市瑞达美磁业有限公司 | 不同宽度波形的径向各向异性多极实心磁体的生产方法 |
CN110211796B (zh) * | 2019-06-11 | 2021-03-02 | 深圳市瑞达美磁业有限公司 | 径向各向异性多极实心磁体及其生产方法和设备 |
CN110323022A (zh) * | 2019-07-24 | 2019-10-11 | 江西金力永磁科技股份有限公司 | 一种连续式烧结磁体的制造方法及其设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543904A (ja) * | 1991-07-16 | 1993-02-23 | Inter Metallics Kk | 永久磁石圧粉体の製造方法 |
JPH1174143A (ja) * | 1997-08-29 | 1999-03-16 | Tokin Corp | 磁性粉末の成形方法 |
WO2011125591A1 (ja) * | 2010-03-31 | 2011-10-13 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
WO2016047593A1 (ja) * | 2014-09-28 | 2016-03-31 | Ndfeb株式会社 | 希土類焼結磁石の製造方法及び当該製法にて使用される製造装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0630312B2 (ja) * | 1984-05-14 | 1994-04-20 | セイコーエプソン株式会社 | 磁場中圧縮成形用金型 |
JPS61113737A (ja) * | 1984-11-07 | 1986-05-31 | Toyota Motor Corp | 磁性を利用した複合化物多孔質体の製造方法 |
CN1054458C (zh) * | 1990-11-30 | 2000-07-12 | 因太金属株式会社 | 制造永磁铁的方法和装置及用于在磁场作用下成型的橡胶模具 |
JPH089120B2 (ja) * | 1990-11-30 | 1996-01-31 | 同和鉱業株式会社 | 静水圧プレス成形法 |
US6548012B2 (en) * | 1999-05-28 | 2003-04-15 | National Research Council Of Canada | Manufacturing soft magnetic components using a ferrous powder and a lubricant |
CN101513672B (zh) * | 2005-02-01 | 2011-09-14 | 东曹株式会社 | 成型模 |
JP4613658B2 (ja) * | 2005-03-23 | 2011-01-19 | Tdk株式会社 | 樹脂結合型永久磁石の製造方法 |
JPWO2008062757A1 (ja) * | 2006-11-21 | 2010-03-04 | 株式会社アルバック | 配向体、成形体及び焼結体の製造方法並びに永久磁石の製造方法 |
JP5140490B2 (ja) * | 2008-05-21 | 2013-02-06 | 日立粉末冶金株式会社 | 焼結部品の製造方法 |
CN105448511A (zh) * | 2014-08-29 | 2016-03-30 | 平湖乔智电子有限公司 | 散热风扇马达磁石的制造方法 |
JP6504044B2 (ja) * | 2015-02-16 | 2019-04-24 | Tdk株式会社 | 希土類系永久磁石 |
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- 2017-11-07 JP JP2018550211A patent/JP6780707B2/ja active Active
- 2017-11-07 CN CN201780067293.7A patent/CN109923629A/zh active Pending
- 2017-11-07 US US16/347,622 patent/US20190326054A1/en not_active Abandoned
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543904A (ja) * | 1991-07-16 | 1993-02-23 | Inter Metallics Kk | 永久磁石圧粉体の製造方法 |
JPH1174143A (ja) * | 1997-08-29 | 1999-03-16 | Tokin Corp | 磁性粉末の成形方法 |
WO2011125591A1 (ja) * | 2010-03-31 | 2011-10-13 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
WO2016047593A1 (ja) * | 2014-09-28 | 2016-03-31 | Ndfeb株式会社 | 希土類焼結磁石の製造方法及び当該製法にて使用される製造装置 |
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CN109923629A (zh) | 2019-06-21 |
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WO2018088393A1 (ja) | 2018-05-17 |
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