JP7211691B2 - Nd-Fe-B系焼結磁性体の製造方法 - Google Patents
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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 (8)
- 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、
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り、
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。 - 前記補助合金粉末の平均粒子径は12~250nmであり、前記補助合金粉末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。
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CN113593873A (zh) * | 2021-06-25 | 2021-11-02 | 京磁材料科技股份有限公司 | 一种高矫顽力混合稀土永磁材料及其制备方法 |
CN113871121A (zh) * | 2021-09-24 | 2021-12-31 | 烟台东星磁性材料股份有限公司 | 耐高温磁体及其制造方法 |
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CN113838622A (zh) * | 2021-09-26 | 2021-12-24 | 太原理工大学 | 一种高矫顽力烧结钕铁硼磁体及其制备方法 |
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