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注射成形钕铁硼粘结磁体研究的现状及前景 总被引:1,自引:0,他引:1
论述了注射成形钕铁硼粘结磁体的特点及发展趋势,分析了其生产工艺中的4个关键因素,包括磁粉、粘结剂与藕联剂、注射过程、充磁过程,并对这4个关键因素的研究状况作了综合评述,认为今后注射成形钕铁硼粘结磁体的研究开发将主要集中在以下4个方面研究:各向异性粉末和各向异性粘结磁体,研发合适的粘结体系及注射成形工艺参数,开发磁能积更高的磁体,开发耐热钕铁硼粘结磁体。 相似文献
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磁体的注射成形是一种高效生产的近净成形技术。为了制备出具有较好综合性能的注射成形粘结钕铁硼永磁材料,研究了粘结剂对注射成形磁体的磁性能、加工性能及力学性能的影响;分析了硅烷系列的偶联剂、复合润滑剂和抗氧剂等添加剂对注射成形磁体性能的影响。结果表明,用MQP-B快淬钕铁硼磁粉和尼龙12粘结剂制备出了剩余磁感应强度为0.539 T,磁感矫顽力为345.37 k A/m,内禀矫顽力为681.02 k A/m,最大磁能积为47.37 k J/m3的注射成形钕铁硼磁体。 相似文献
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粘结钕铁硼磁环在高性能永磁式步进电动机上的应用 总被引:2,自引:0,他引:2
钕铁硼粘结磁体是一种将钕铁硼磁粉与高分子树脂或塑料或低熔点合金及各种添加剂均匀混合,用模压、挤出或注射成形等方法制成的复合永磁材料。国内外对其机理的研究已比较深入,本课题仅就钕铁硼粘结磁体特别是应用于高性能永磁式步进电动机的粘结钕铁硼多极磁环的制备工艺中的关键问题进行了研究,内容包括:(1)专用粘结剂的选择;(2)磁粉选择;(3)薄壁磁环自动压制成形;(4)表面防锈处理方式的选择;(5)多极充磁;(6)磁环转子整体注射成形。结果表明:在解决了上述关键工艺问题后,粘结钕铁硼多极磁环已批量应用于高性能永磁式步进电动机,替代进口或使原有的电机升级换代 相似文献
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磁性材料注射成形技术 总被引:2,自引:0,他引:2
概括了金属粉末注射成形技术(MIM)制造粘结永磁和烧结磁体的特点和优点。详细介绍MIM粘结永磁和烧结磁体的基本工艺过程及基本要求。综述了注射成形磁性材料的主要研究与发展方向。最后指出磁性材料注射成形技术的研究意义。 相似文献
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讨论了粉末注射成形在粘结磁体生产中的应用和烧结磁体研究开发的现状。介绍了注射成形用磁粉的多种制造方法,常用注射成形粘结磁体和杂合磁体的基本性能及应用。分析了影响注射成形磁体性能的技术关键。指出了粉末注射成形在生产低成本、高精度、高性能磁体的技术优势。 相似文献
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增材制造技术是一种不受加工工具限制成型复杂形状产品的添加式制造技术。简要概述了利用增材制造技术(AM)-3D打印成形粘结钕铁硼磁体的基本过程,比较了传统成形和3D打印成形两种方法制造粘结钕铁硼磁体的优点和不足,着重介绍了粘结钕铁硼磁制件的3种3D打印方法:三维打印粘结成型(3DP)、大区域增材制造技术(BAAM)、直接喷墨打印成型(Direct-write 3DP),并指出利用3D打印成型粘结钕铁硼磁体的发展趋势。3D打印作为一种先进的制造技术,可以实现复杂形状钕铁硼产品的近净成形,不需后续的机械加工,大大节约了资源,降低了能耗,提高了生产效率,可以制造传统方法难以制造的复杂结构制件。但是利用3D打印技术成型钕铁硼产品也存在一些困难,比如对打印粉体的尺寸、形状及成分要求较高、适合打印的粉体粘结剂以及如何提高粉体的固含量等问题,这些都将是今后磁性材料3D打印中需要解决的问题。 相似文献
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第四届全国钕铁硼会议于1992年11月1日至6日在桂林举行,会上对钕铁硼近期的工作作了介绍。综述性的论文有:新一代磁体的开发,日本烧结钕铁硼的现状和将来;NdFeB粘结磁体的工艺现状和发展;NdFeB国际市场应用和开发策略;NdFeB粘结磁体的工艺现状和发展。对钕铁硼材料研究的论文有:超高内禀 相似文献
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注射成型粘结NdFeB永磁体 总被引:10,自引:0,他引:10
介绍了粘结永磁体的制备工艺,快淬NdFeB磁粉,HDDR磁粉及粘结磁体的磁性.提出了目前注射制备NdFeB磁体的技术开发要点. 相似文献
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The bonded NdFeB magnets prepared by injection molding meet with the development tendency of the magnet in small volume, light weight and high performance ,and have a good prospect.In this paper, a modified nylonbased binder was developed for powder injection molding of NdFeB bonded magnets.The effects of pretreatment of NdFeB anisotropic magnetic powder produced with HDDR processing on the anti-oxidation behaviors of powder and the final magnetic properties of the molded bonded magnets were studied.The optimal powder loading of 65 vol% was achieved with the modified binder.It was found that the properties of the bonded magnets were mainly affected by the powder surface pretreatment and the intensity of the applied alignment magnetic field during injection molding for a certain powder.Bonded magnets with remanence of 0.820 T, intrinsic coercivity of 1140.3 kA· m-1 and maximum energy product of 111 kJ · m-3 were produced with the optimal processing. 相似文献
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《钢铁研究学报(英文版)》2006
Properties of NdFeB bonded magnets by injection moulding lie on many factors. The study indicates that those such as coupling agents exterior covering, binder contents, antioxidant and the selection of lubricator have significant effects on the properties of NdFeB bonded magnets. The appropriate choice of additives can improve the properties of NdFeB bonded magnet. 相似文献
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快淬钕铁硼永磁合金及粘结磁体 总被引:8,自引:0,他引:8
综述了快淬钕铁硼磁粉、各向同性粘结钕铁硼磁体、各向异性钕铁硼磁粉及粘结磁体、双相纳米复合磁粉及粘结磁体的国内外现状、前景以及粘结NdFeB磁体的应用。 相似文献
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Investigation on the Moldability of HDDR NdFeB Bonded Magnet Prepared by Compression Molding Method 总被引:1,自引:0,他引:1
The phenomenon of uneven density distribution is inevitable in the process of preparing bonded magnets with complicated shape or with large geometric size by compression molding due to the friction among magnetic powder grains and between magnetic powder and the die wall, which reduces the pressure along the compression direction. In order to improve the density distribution homogeneity, the thin-wall rings with composition of HDDR NdFeB prepared by compression molding were selected as the investigated object in this study. It was systematically investigated on the effect of addition level of lubricants and the addition methods of lubricants and strengthener on magnet density, density distribution and on magnet strength. By means of joint addition of lubricants and strengthener, which increases the magnet density and improves the magnet density distribution under the precondition of keeping the magnet strength unreduced. Thus the moldability of the bonded magnets is improved. 相似文献