JP2022023018A - Nd-Fe-B系焼結磁性体の製造方法 - Google Patents
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- 239000000696 magnetic material Substances 0.000 title claims abstract description 83
- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title abstract description 23
- 238000009792 diffusion process Methods 0.000 claims abstract description 122
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 40
- 239000000956 alloy Substances 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 39
- 239000010949 copper Substances 0.000 claims abstract description 31
- 230000032683 aging Effects 0.000 claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 13
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 9
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 9
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 8
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical group [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000014509 gene expression Effects 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 claims description 56
- 239000002245 particle Substances 0.000 claims description 35
- 230000006698 induction Effects 0.000 claims description 11
- 238000010298 pulverizing process Methods 0.000 abstract description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 40
- 229910052761 rare earth metal Inorganic materials 0.000 description 30
- 239000000758 substrate Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
- 150000002910 rare earth metals Chemical class 0.000 description 13
- 239000002994 raw material Substances 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 9
- 230000005389 magnetism Effects 0.000 description 9
- 229910052779 Neodymium Inorganic materials 0.000 description 8
- 229910052796 boron Inorganic materials 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- -1 rare earth fluoride Chemical class 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 238000000441 X-ray spectroscopy Methods 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
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- 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
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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
- 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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- 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
- H01F1/12—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 soft-magnetic materials
- H01F1/14—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 soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15341—Preparation processes therefor
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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
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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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- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
Abstract
Description
工程1:真空誘導炉を用いて多成分合金インゴットを製造し、続いて真空ストリップキャスト炉を用いて多成分合金ストリップを製造し、
前記多成分合金の原子比化学式はPraRHbGacCudで示され、PrはPr元素、RHはジスプロシウム元素又はテルビウム元素の少なくとも一つ、Gaはガリウム元素、Cuは銅元素であり、
a、b、c、及びdは、0.30≦(a+b)/(a+b+c+d)≦0.65、0.20≦d/(c+d)≦0.50、0.23≦b/(a+b)≦0.60の関係式を満たし、
工程2:前記多成分合金ストリップを粉砕して粉末にし、前記Nd-Fe-B系焼結磁性体の表面に付着させ、
工程3:前記多成分合金粉末を付着させた前記Nd-Fe-B系焼結磁性体を高温拡散処理及び低温時効処理し、拡散処理後の前記Nd-Fe-B系焼結磁性体を得る、
ことを特徴とする。
まず、原子比化学式PraRHbGacCudに基づいて原材料を配合する。PrはPr元素、RHはジスプロシウム元素又はテルビウム元素の少なくとも一つ、Gaはガリウム元素、Cuは銅元素である。a、b、c、及びdは、0.30≦(a+b)/(a+b+c+d)≦0.65、0.20≦d/(c+d)≦0.50、0.23≦b/(a+b)≦0.60の関係式を満たす。
原子比化学式Pr50Tb15Cu7Ga28に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。このストリップを平均粒径1000μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
原子比化学式Pr12Tb18Cu35Ga35に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。このストリップを平均粒径10μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
原子比化学式Pr30Tb20Cu15Ga35に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。このストリップを平均粒径50μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
原子比化学式Pr30Dy20Cu15Ga35に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。このストリップを平均粒径600μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
原子比化学式Pr30Tb10Dy10Cu15Ga35に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。ストリップを平均粒径300μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
原子比化学式Pr1Tb69Cu29Ga1に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。このストリップを平均粒径300μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
原子比化学式Pr69Tb1Cu10Ga20に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。このストリップを平均粒径300μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
原子比化学式Pr20Tb5Cu40Ga35に基づいて原材料を配合し、真空誘導炉を用いてインゴットを溶錬し、得られたインゴットを、真空ストリップキャスト炉を用いてストリップへと加工した。このストリップを平均粒径300μmの粉末へと粉砕し、素地重量比で2.0%の粉末を従来の設備とプロセスで製造したNd-Fe-B系焼結磁性体素地の表面へ付着させた。
Claims (7)
- Nd-Fe-B系焼結磁性体の製造方法であって、
工程1:真空誘導炉を用いて多成分合金インゴットを製造し、続いて真空ストリップキャスト炉を用いて多成分合金ストリップを製造し、
前記多成分合金の原子比化学式はPraRHbGacCudで示され、PrはPr元素、RHはジスプロシウム元素又はテルビウム元素の少なくとも一つ、Gaはガリウム元素、Cuは銅元素であり、
a、b、c、及びdは、0.30≦(a+b)/(a+b+c+d)≦0.65、0.20≦d/(c+d)≦0.50、0.23≦b/(a+b)≦0.60の関係式を満たし、
工程2:前記多成分合金ストリップを粉砕して粉末にし、前記Nd-Fe-B系焼結磁性体の表面に付着させ、
工程3:前記多成分合金粉末を付着させた前記Nd-Fe-B系焼結磁性体を高温拡散処理及び低温時効処理し、拡散処理後の前記Nd-Fe-B系焼結磁性体を得る、
ことを特徴とするNd-Fe-B系焼結磁性体の製造方法。 - 前記多成分合金ストリップを粉砕した前記粉末の平均粒径は、10μm~1000μmである、
ことを特徴とする請求項1に記載のNd-Fe-B系焼結磁性体の製造方法。 - 前記多成分合金ストリップを粉砕した前記粉末の平均粒径は、50μm~600μmである、
ことを特徴とする請求項1に記載のNd-Fe-B系焼結磁性体の製造方法。 - 前記Nd-Fe-B系焼結磁性体の前記表面とは、配向方向に垂直な面である、
ことを特徴とする請求項1ないし3のいずれか1項に記載のNd-Fe-B系焼結磁性体の製造方法。 - 前記高温拡散処理の温度は720℃~980℃、拡散時間は5~25時間であり、
前記低温時効処理の温度は480℃~680℃、処理時間は1~10時間である、
ことを特徴とする請求項1ないし4のいずれか1項に記載のNd-Fe-B系焼結磁性体の製造方法。 - 拡散によって主相粒子の外周に導入されたテルビウム元素及び/又はジスプロシウム元素の分布領域は、いずれも拡散によって導入されたPr元素の分布領域の範囲内である、
ことを特徴とする請求項1ないし5のいずれか1項に記載のNd-Fe-B系磁性体の製造方法。 - 拡散によって導入されたテルビウム及び/又はジスプロシウム元素の磁性体内における分布深さは、少なくとも400μmである、
ことを特徴とする請求項1ないし6のいずれか1項に記載のNd-Fe-B系磁性体の製造方法。
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105355353A (zh) * | 2015-12-18 | 2016-02-24 | 江西金力永磁科技股份有限公司 | 一种钕铁硼磁体及其制备方法 |
JP2017130645A (ja) * | 2015-12-18 | 2017-07-27 | 江西金力永磁科技股▲分▼有限公司Jl Mag Rare−Earth Co., Ltd. | ネオジム鉄ホウ素磁石およびその調製法 |
WO2018034264A1 (ja) * | 2016-08-17 | 2018-02-22 | 日立金属株式会社 | R-t-b系焼結磁石 |
WO2018062174A1 (ja) * | 2016-09-29 | 2018-04-05 | 日立金属株式会社 | R-t-b系焼結磁石の製造方法 |
JP2019062153A (ja) * | 2017-09-28 | 2019-04-18 | 日立金属株式会社 | R−t−b系焼結磁石の製造方法 |
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EP3937199A1 (en) | 2022-01-12 |
CN113096947B (zh) | 2023-02-10 |
CN113096947A (zh) | 2021-07-09 |
US20220005637A1 (en) | 2022-01-06 |
JP7170377B2 (ja) | 2022-11-14 |
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