JP2023043831A - LaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法 - Google Patents
LaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法 Download PDFInfo
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- 239000000696 magnetic material Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 229910001172 neodymium magnet Inorganic materials 0.000 title abstract description 4
- 239000000956 alloy Substances 0.000 claims abstract description 159
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 159
- 239000000843 powder Substances 0.000 claims abstract description 74
- 239000002245 particle Substances 0.000 claims abstract description 38
- 238000011282 treatment Methods 0.000 claims abstract description 28
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 23
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 9
- 238000001179 sorption measurement Methods 0.000 claims abstract description 9
- 238000010298 pulverizing process Methods 0.000 claims abstract description 5
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 230000032683 aging Effects 0.000 claims abstract description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 229910052733 gallium Inorganic materials 0.000 claims description 14
- 229910052746 lanthanum Inorganic materials 0.000 claims description 14
- 229910052719 titanium Inorganic materials 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 8
- 229910052779 Neodymium Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 238000003801 milling Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 239000012535 impurity Substances 0.000 description 13
- 238000001816 cooling Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 229910052777 Praseodymium Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005324 grain boundary diffusion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Abstract
Description
(ステップ1)各材料を予め定めた割合で配合し、真空ストリップキャスト炉でR1合金及びR2合金を製造し、ここで前記R1合金はPr及び/又はNdとLa及び/又はCe元素を含み、前記R2合金はLa及びCe元素を含まずにPr及び/又はNdを含み、
(ステップ2)前記R1合金及び前記R2合金を、それぞれ水素吸着処理及び脱水素処理を行い、ジェットミルによって粉砕製粉し、粉砕製粉後の前記R1合金及び前記R2合金の平均粒子径は、0.32≦前記R2合金の平均粒子径/前記R1合金の平均粒子径≦0.66の関係式を満たし、
(ステップ3)前記R1合金の粉末及び前記R2合金の粉末を混合し、
(ステップ4)混合後の粉末を成型及び配向し、冷間等静圧処理、焼結処理、時効処理して磁性体を得る、
ことを特徴とする。
(ステップ1)予め定めた割合に応じて材料を配合し、真空ストリップキャスト炉でR1合金及びR2合金を作成した。R1合金中の各元素及び含有量(重量百分率)は、Nd:23.00%、Ce:6.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。R2合金中の各元素及び含有量(重量百分率)は、Pr:35.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。真空ストリップキャスト炉でR1合金及びR2合金を、それぞれストリップキャスト合金薄片へと加工した。
(ステップ1)予め定めた割合に応じて材料を配合し、真空ストリップキャスト炉でR1合金及びR2合金を作成した。R1合金中の各元素及び含有量(重量百分率)は、Nd:8.80%、Pr:2.20%、Ce:10.00%、La:10.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。R2合金中の各元素及び含有量(重量百分率)は、Nd:26.50%、Pr:6.60%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。真空ストリップキャスト炉でR1合金及びR2合金を、それぞれストリップキャスト合金薄片へと加工した。
(ステップ1)予め定めた割合に応じて材料を配合し、真空ストリップキャスト炉でR1合金及びR2合金を作成した。R1合金中の各元素及び含有量(重量百分率)は、Pr:18.00%、La:12.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。R2合金中の各元素及び含有量(重量百分率)は、Nd:34.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。真空ストリップキャスト炉でR1合金及びR2合金を、それぞれストリップキャスト合金薄片へと加工した。
<比較例1>
(ステップ1)予め定めた割合に応じて材料を配合し、真空ストリップキャスト炉でR1合金及びR2合金を作成した。R1合金中の各元素及び含有量(重量百分率)は、Nd:23.00%、Ce:6.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。R2合金中の各元素及び含有量(重量百分率)は、Pr:35.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。真空ストリップキャスト炉でR1合金及びR2合金を、それぞれストリップキャスト合金薄片へと加工した。
(ステップ1)予め定めた割合に応じて材料を配合し、真空ストリップキャスト炉でR1合金及びR2合金を作成した。R1合金中の各元素及び含有量(重量百分率)は、Nd:26.00%、Ce:6.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。R2合金中の各元素及び含有量(重量百分率)は、Pr:32.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。真空ストリップキャスト炉でR1合金及びR2合金を、それぞれストリップキャスト合金薄片へと加工した。
(ステップ1)予め定めた割合に応じて材料を配合し、真空ストリップキャスト炉でR1合金及びR2合金を作成した。R1合金中の各元素及び含有量(重量百分率)は、Nd:7.20%、Pr:1.80%、Ce:11.00%、La:11.00%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。R2合金中の各元素及び含有量(重量百分率)は、Nd:26.50%、Pr:6.60%、B:0.95%、Co:1.00%、Al:0.60%、Cu:0.15%、Ga:0.40%、Ti:0.15%、残りはFe及び不可避の不純物である。真空ストリップキャスト炉でR1合金及びR2合金を、それぞれストリップキャスト合金薄片へと加工した。
Claims (7)
- LaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法であって、
(ステップ1)各材料を予め定めた割合で配合し、真空ストリップキャスト炉でR1合金及びR2合金を製造し、ここで前記R1合金はPr及び/又はNdとLa及び/又はCe元素を含み、前記R2合金はLa及びCe元素を含まずにPr及び/又はNdを含み、
(ステップ2)前記R1合金及び前記R2合金を、それぞれ水素吸着処理及び脱水素処理を行い、ジェットミルによって粉砕製粉し、粉砕製粉後の前記R1合金及び前記R2合金の平均粒子径は、0.32≦前記R2合金の平均粒子径/前記R1合金の平均粒子径≦0.66の関係式を満たし、
(ステップ3)前記R1合金の粉末及び前記R2合金の粉末を混合し、
(ステップ4)混合後の粉末を成型及び配向し、冷間等静圧処理、焼結処理、時効処理して磁性体を得る、
ことを特徴とするLaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法。 - 前記(ステップ1)における前記R1合金に含まれる希土類元素の総含有量は、29.00~31.00wt%である、
ことを特徴とする請求項1に記載のLaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法。 - 前記R1合金に含まれる希土類元素のうち、La及び/又はCeの含有量は6.00~20.00wt%であり、その他はPr及び/又はNdである、
ことを特徴とする請求項2に記載のLaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法。 - 前記(ステップ1)における前記R2合金に含まれるPr及び/又はNdの含有量は33.10~35.00wt%である、
ことを特徴とする請求項1に記載のLaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法。 - 前記(ステップ2)における粉砕製粉後の前記R1合金の平均粒子径は、3.1~5.5μmであり、粉砕製粉後の前記R2合金の平均粒子径は、1.0~3.6μmである、
ことを特徴とする請求項1に記載のLaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法。 - 前記(ステップ1)において、前記R1合金及び前記R2合金は、B、Co、Cu、Ga、Ti、Al及びFe元素を含む、
ことを特徴とする請求項1に記載のLaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法。 - 前記(ステップ3)における前記R1合金の粉末及び前記R2合金の粉末の混合比は、1:1である、
ことを特徴とする請求項1に記載のLaCe添加型Pr・Nd-Fe-B系焼結磁性体の製造方法。
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CN115410786A (zh) * | 2022-08-11 | 2022-11-29 | 南通正海磁材有限公司 | 一种烧结R-Fe-B永磁体及其制备方法和应用 |
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CN102842400B (zh) | 2012-08-14 | 2016-04-06 | 中钢集团安徽天源科技股份有限公司 | 镧铈掺杂制备低成本烧结钕铁硼的方法 |
CN102800454B (zh) | 2012-08-30 | 2017-03-22 | 钢铁研究总院 | 低成本双主相Ce永磁合金及其制备方法 |
CN106710768A (zh) | 2016-12-27 | 2017-05-24 | 浙江大学 | 一种添加氢化钕提高钕铈铁硼烧结磁体矫顽力的方法 |
CN108183010A (zh) * | 2017-12-14 | 2018-06-19 | 浙江大学 | 一种同时提高钕铈铁硼烧结磁体磁性能和抗腐蚀性能的方法 |
CN110895985A (zh) * | 2019-11-06 | 2020-03-20 | 包头稀土研究院 | 混合稀土烧结钕铁硼永磁体及其制备方法 |
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US20130154778A1 (en) * | 2011-12-15 | 2013-06-20 | Central Iron And Steel Research Institute | Low-neodymium, non-heavy-rare-earth and high performance magnet and preparation method |
JP2017076680A (ja) * | 2015-10-14 | 2017-04-20 | Tdk株式会社 | R−t−b系焼結磁石およびモータ |
CN108231312A (zh) * | 2017-12-26 | 2018-06-29 | 钢铁研究总院 | 一种基于混合稀土制备的永磁合金及其制备方法 |
US20210233689A1 (en) * | 2018-07-18 | 2021-07-29 | Central Iron And Steel Research Institute | Ce-containing sintered rare-earth permanent magnet with having high toughness and high coercivity, and preparation method therefor |
CN109585109A (zh) * | 2018-10-23 | 2019-04-05 | 宁波同创强磁材料有限公司 | 一种混合稀土永磁体及其制备方法 |
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