【作者】 王旭；

【导师】 王晓冬；

【作者基本信息】 东北大学 ， 流体机械及工程， 2006， 硕士

【摘要】 钕铁硼作为新型的第三代永磁物料，目前，欧洲、非洲、东南亚市场状况较好。我国钕铁硼出口量逐年增加。目前西方国家钕铁硼最大的用户是计算机外围设备的驱动器，最引人注目的是核磁共振成像仪(MRI)。从长远看，电机将是钕铁硼的主要用户。除此之外，水处理及污水净化，电磁开关，磁悬浮运输车，辆磁力机械，音响器件也是大宗用户。未来是磁的世界，磁渗透到生活的广大领域，德国的磁浮列车已经产业化了。展望钕铁硼的市场前景是非常好的。关键是我们能不能抢占了这个大市场。对我国来说，做为信息技术的计算机在蓬勃发展日益普及的今天，对钕铁硼来说是一个大的市场。 钕铁硼真空快速凝固的合金铸造技术是制备高性能烧结NdFeB磁体的关键工艺之一。根据高性能磁体制造的设计要求，NdFeB合金铸锭微观组织应该具有柱状晶完整、没有α-Fe偏析相，富钕相弥散分布的特点。 本文通过实验比较了现有几种常用的铸造方法—平板铸造、柱状铸造、薄板铸造等得到的合金铸锭，通过扫描电镜观察了铸锭的组织结构，通过破碎-球磨-晶化处理方法得到了磁粉，并进行了磁性能测试，通过对实验结果的分析对比，比较了各自的优缺点。 对薄板铸造的夹板模进行了基本的传热分析计算，并进行了结构改进，通过实验样品的组织结构和磁粉性能比较，验证了改进的效果，分析了平板铸造技术的存在的问题和发展前景。 重点研究了高性能NdFeB磁体制备的铸造工艺—薄片铸锭法。提出了薄片铸锭的改进思路和确定工艺路线的方法，并通过实验制备了相应的样品，通过扫描电镜观察了薄片铸锭的组织结构，通过快淬方法得到相应磁粉，并进行了性能测试，对实验数据进行了整理和分析，分析了薄片铸锭存在的问题、改进方法和应用前景。更多还原

【Abstract】 The NdFeB conduct new third generation manget material, currently, Europe, Africa, Southeast Asia market condition is better. In our country the quantity of NdFeB export increases year by year. Currently the western and national the biggest NdFeB customer is the actuator of the calculator peripherals, mosttheeye-catcher is a nuclear magnetic resonance to become to be like an instrument (MRI). From farsighted see, the electrical engineering will be the main customer of the NdFeB . In addition, the water processing and the dirty water decontamination electromagnetism switch manget suspend a conveyance, the vehicle magnetic force machine, the stereo set spare part is also a big customer. The future is the world of the manget , the manget seeps through the large realm of the life, the magnetic levitation railroad train of Germany already the industry turned. The market foreground that prospects the NdFeB is very nice. Key is we can rob to have this big market. Say to the our country, be used as the calculator of the information technique being develop rapidly increasingly universal of today, say to the NdFeB that is a big market.The NdFeB vacuum solidifies quickly’s casting technique is one of the key crafts that makes a high performance to burn the knot NdFeB magnet. To get the high performance magnet system, the tiny view organization of NdFeB metal alloy ingot should have the pillar form crystal integrity, no α -Fe to be partial to separate, enrich Nd form dispersion to spread the characteristics for distribute.In this thesis, the metal alloyes getting from several common foundry methods-flat panels to cast, the pillar form cast, the lamella cast etc. were compared by the experiments and the organization of the casting knot was observed by electron microscope.. The magnet powder was made by the method of broken更多还原