| Nd-Fe-B速凝铸片显微组织控制及低成本烧结磁体制备 |
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| 引用本文： | 沈鑫,李军,向前,张蛟,刘颖. Nd-Fe-B速凝铸片显微组织控制及低成本烧结磁体制备[J]. 磁性材料及器件, 2016, 0(4). DOI: 10.3969/j.issn.1001-3830.2016.04.001 |
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| 作者姓名： | 沈鑫 李军 向前 张蛟 刘颖 |
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| 作者单位： | 四川大学材料科学与工程学院,四川成都,610065 |
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| 基金项目： | 四川省科技支撑计划资助项目(2014GZ0090) |
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| 摘 要： | 利用片铸工艺制备了低稀土含量的钕铁硼合金铸片。对铸片显微特征进行表征,对比分析了不同厚度铸片的微观组织。发现厚度小于0.35mm时,铸片具有细小均匀的片状晶组织,无α-Fe产生;当厚度超过0.35mm,铸片的近自由端存在α-Fe树枝晶。调节辊轮线速度为2.5m/s时,获得了集中在0.2~0.35mm的厚度分布。通过添加低熔点晶界合金粉末,制得了具有较优显微结构和磁性能的低成本烧结稀土磁体。
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| 关 键 词： | 烧结钕铁硼磁体 片铸 厚度 显微组织 稀土含量 磁性能 |
Study on the microstructure of Nd-Fe-B casting strips and preparation of low-cost sintered magnets |
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| SHEN Xin,LI Jun,XIANG Qian,ZHANG Jiao,LIU Ying. Study on the microstructure of Nd-Fe-B casting strips and preparation of low-cost sintered magnets[J]. Journal of Magnetic Materials and Devices, 2016, 0(4). DOI: 10.3969/j.issn.1001-3830.2016.04.001 |
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| Authors: | SHEN Xin LI Jun XIANG Qian ZHANG Jiao LIU Ying |
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| Abstract: | Nd-Fe-B casting strips with low rare-earth content were prepared and characterized. The microstructure of the strips of different thickness was investigated. It was observed that when the thickness of casting strip was less than 0.35 mm, the formation ofα-Fe was effectively depressed and the columnar grains were fine, whileα-Fe dendrites were found in the free side of the strips thicker than 0.35mm. Optimized thickness distribution in the range of 0.2 to 0.35 mm, was acquired with a wheel speed of 2.5 m/s. By adding low-melting-point boundary alloy, sintered magnets with low-cost were produced with homogeneous microstructure and practical magnetic properties. |
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| Keywords: | sintered Nd-Fe-B magnet strip casting hickness of strip microstructure rare-earth content magnetic properties |
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