JP2022109870A - Nd-Fe-B系焼結磁性体の製造方法 - Google Patents
Nd-Fe-B系焼結磁性体の製造方法 Download PDFInfo
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 193
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 189
- 239000000956 alloy Substances 0.000 claims abstract description 189
- 239000011258 core-shell material Substances 0.000 claims abstract description 31
- 238000011282 treatment Methods 0.000 claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 18
- 230000008018 melting Effects 0.000 claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 11
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000000696 magnetic material Substances 0.000 claims description 49
- 238000005496 tempering Methods 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 229910000521 B alloy Inorganic materials 0.000 claims description 8
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 229910052771 Terbium Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052733 gallium Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 229910052689 Holmium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000011858 nanopowder Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 20
- 239000011257 shell material Substances 0.000 description 16
- 239000011162 core material Substances 0.000 description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 10
- 238000009694 cold isostatic pressing Methods 0.000 description 10
- 239000001257 hydrogen Substances 0.000 description 10
- 239000013078 crystal Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
(ステップ1)主合金粉末となるNd-Fe-B系合金粉末を作成し、
(ステップ2)金属Mの粉末をコアとし、前記金属Mの前記粉末の表面にシェルとなるR-H希土類合金の粉末をコーティングしてコアシェル構造を有する補助合金粉末を作成し、前記金属Mの融点>前記R-H希土類合金の融点であり、
(ステップ3)前記補助合金粉末を前記Nd-Fe-B系合金粉末に添加して均一に混合した後、磁場配向加圧プレス、焼結処理、時効処理を行う、
ことを特徴とする。
(1)製錬法によって(PrNd)32Co1Al0.38Cu0.1Ti0.15B1.0Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径2μmの主合金粉末を作成した。
(1)製錬法によって(PrNd)32Co1Al0.38Cu0.1Ti0.15B1.0Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径2μmの主合金粉末を作成した。
(1)製錬方によってNd30Co0.9Al0.75Cu0.1Ti0.15B0.9Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径4μmの主合金粉末を作成した。
(1)製錬法によってNd30Co0.9Al0.75Cu0.1Ti0.15B0.9Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径4μmの主合金粉末を作成した。
(1)製錬法によって(PrNd)29.5Co1Ga0.2Cu0.1Ti0.15B1.0Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径4μmの主合金粉末を作成した。
(1)製錬法によって(PrNd)29.5Co1Ga0.2Cu0.1Ti0.15B1.0Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径4μmの主合金粉末を作成した。
(1)製錬法によって(PrNd)31Co1Tb1.1Al0.2Ga0.3Cu0.1Ti0.15B1.0Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径6μmの主合金粉末を作成した。
(1)製錬法によって(PrNd)31Co1Tb1.1Al0.2Ga0.3Cu0.1Ti0.15B1.0Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径6μmの主合金粉末を作成した。
(1)製錬法によって(PrNd)31Co1Dy0.5Al0.1Ga0.25Cu0.1Hо0.1B0.9Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径5μmの主合金粉末を作成した。
(1)製錬法によって(PrNd)31Co1Dy0.5Al0.1Ga0.25Cu0.1Hо0.1B0.9Febalからなるストリップキャスト薄片を作成した。その後、水素粉砕し、ジェットミルを用いて更に粉砕し、平均粒子径5μmの主合金粉末を作成した。
2 コア材料
3 シェル材料
Claims (10)
- Nd-Fe-B系焼結磁性体の製造方法であって、
(ステップ1)主合金粉末となるNd-Fe-B系合金粉末を作成し、
(ステップ2)金属Mの粉末をコアとし、前記金属Mの前記粉末の表面にシェルとなるR-H希土類合金の粉末をコーティングしてコアシェル構造を有する補助合金粉末を作成し、前記金属Mの融点>前記R-H希土類合金の融点であり、
(ステップ3)前記補助合金粉末を前記Nd-Fe-B系合金粉末に添加して均一に混合した後、磁場配向加圧プレス、焼結処理、時効処理を行う、
ことを特徴とするNd-Fe-B系焼結磁性体の製造方法。 - 前記Nd-Fe-B系合金粉末は、さらにRx及び/又はTを含み、RxはPr、La、Ce、Dy、Tb、Hoの内の一つ又は複数の組み合わせであり、TはAl、Cu、Co、Ga、Zr、Nb、Mn、Tiの内の一つ又は複数の組合せである、
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系合金粉末のNd+Rxの含有量は28重量%~32重量%、Bの含有量は0.8重量%~1.2重量%、Tの含有量は0~5重量%、その他の成分はFeである、
ことを特徴とする請求項2に記載のNd-Fe-B系焼結磁性体の製造方法。 - 前記Nd-Fe-B系合金粉末の平均粒子径は2~6μmであり、前記金属Mの前記粉末の平均粒子径は5~200nm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。 - 前記金属Mは、Mo、W、Zr、Ti、Nbの内の一つ又は複数の組み合わせである、
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。 - 前記R-H希土類合金のRは、Dy、Tb、Pr、Nd、La、Ceの内の一つ又は複数の組み合わせであり、Hは、Cu、Al、Gaの内の一つ又は複数の組み合わせである、
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系焼結磁性体の製造方法。 - 前記補助合金の平均粒子径は12~250nmであり、前記補助合金の前記コアと前記シェルの体積比は1:1~1:20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系焼結磁性体の製造方法。 - 前記Nd-Fe-B系合金粉末に対する前記補助合金粉末の添加比率は0.1重量%~5重量%である、
ことを特徴とする請求項1ないし7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。 - 前記焼結処理の温度は、950℃~1100℃、焼結時間は6~12時間である、
ことを特徴とする請求項1ないし8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。 - 前記時効処理は、第1次焼き戻し処理及び第2次焼き戻し処理を含み、前記第1次焼き戻し処理の温度は800℃~900℃、焼き戻し時間は3~15時間であり、前記第2次焼き戻し処理の温度は450℃~650℃、焼き戻し時間は3~10時間である、
ことを特徴とする請求項1ないし9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。
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