随着《中国制造2025》的颁布，制造业在国民经济中的主体地位被再次明确并强调。作为“制造业最锋利的牙齿”，近年来国内外无论是工业界还是学术界对陶瓷结合剂CBN砂轮(后简称为陶瓷CBN砂轮)及其磨削技术的研究、开发及应用数量均呈现井喷式增长。然而，目前陶瓷CBN磨具行业内的高端高性能产品仍几乎均被国外工业发达国家所垄断。 针对我国目前高性能陶瓷CBN砂轮制备方面的落后现状及技术瓶颈，本文以国家自然科学基金面上项目“基于强电磁过程的纳米陶瓷结合剂高性能CBN砂轮及其磨削性能研究”(项目编号51275084)为基础，尝试将纳米材料技术和强磁场材料制备技术引入到了砂轮制备过程中，并制得了具有特定磨粒取向和致密结合剂结构的纳米陶瓷结合剂CBN砂轮(下文简称为强磁场砂轮)。随后，本文对强磁场砂轮的磨削性能(包括磨后表面完整性、磨削力以及磨削温度)进行了理论建模，并通过开展大量针对金属和硬脆材料的磨削实验比较了强磁场砂轮和普通陶瓷结合剂CBN砂轮的磨削性能。 本文的主要研究内容包括： (1)通过实验综合评价并比较了国内外多种CBN磨粒产品的质量与性能。随后又创新性地将多种纳米材料添加至传统陶瓷结合剂配方中，并通过开展正交实验优化了纳米陶瓷结合剂的组分配方和各组分占比，制得了烧结工艺性和机械性能均优于传统陶瓷结合剂的纳米陶瓷结合剂； (2)通过理论分析和实验观测探究了常温下普通磁场以及高温下强磁场对CBN磨粒、结合剂以及二者混合体系的作用效果与规律。基于此，本研究将强磁场材料制备技术引入至砂轮烧结过程中，制得了具有特定磨粒取向和致密结合剂结构的强磁场纳米陶瓷CBN砂轮，并对重要的制备工艺参数(如砂轮烧结温度曲线、强磁场加载／卸载参数等)进行了优选； (3)考虑到强磁场砂轮具有特殊的微观结构，本研究分别针对金属和硬脆材料不同磨削去除机理，提出了考虑磨粒和工件间瞬态微观接触状态的磨后表面形貌、磨削力、以及磨削温度仿真建模方法并对其进行了实验验证，为分析本文砂轮特殊结构与其磨削性能间关系提供了分析方法和手段； (4)本研究通过开展针对金属(45#钢以及钛合金)以及硬脆材料(光学玻璃和单晶硅)的磨削实验，对比了强磁场砂轮和普通陶瓷CBN砂轮在磨后工件表面完整性、磨削力以及磨削温度方面的磨削性能，并通过本文提出的理论模型对砂轮磨削性能的差异进行了定性解释。 关键词：强磁场、陶瓷CBN砂轮、磨削、磨削仿真、纳米材料 *论文工作得到的项目支持：国家自然科学基金委员会资助项目(No.51275084)

With the recently released strategy named “Made in China 2025”, the importance of manufacturing engineering has been strongly highlighted. Among all the manufacturing technologies, vitrified CBN grinding wheels and the corresponding grinding techniques have been considered as one of the most crucial ones, which can be evidenced by the surged numbers of both published papers and industrial application cases. However, most of the high-performance and high-end vitrified CBN products can only be provided by famous industrial companies in developed countries. To fill this gap, this thesis attempts to introduce both nano-materials and strong-magnetic-field-sintering technologies into the fabrication of vitrified CBN grinding wheels. Except for the wheel fabrication, large numbers of grinding trials are also performed to evaluate the produced wheel performances in comparison with two conventional vitrified CBN grinding wheels, in terms of machined surface integrity, grinding force/force ratio, and temperature. To understand the superior wheel performances, theoretical modeling metholodgies of the ground surface topography, grinding force, and grinding temperature considering varied grain-workpiece micro interactions are also proposed. The studied topics in this thesis might include: (1)Unlike routinely employing the abrasive products recommended by abrasive companies, this thesis performs systematic experiments to comprehensively evaluate and compare the quality and performance of several kinds of domestic and international abrasive products. Also, this thesis innovatively introduces several kinds of nano-materials into the vitrified bond mixture. More importantly, the optimised component weight ratios of the nanomaterial-impregnated vitrified bond mixture are also determined based on the orthogonal experiment design method. The results show that, thanks to the high specific surface energy and chemical activity, nano-materials are effective to produce more superior bond matrix in terms of both fabrication manufacturability and mechanical properties; (2)This thesis also innovatively introduces the strong-magnetic-field-sintering technology into the wheel fabrication process. The grinding wheel with preferentially-oriented grains as well as compactly-textured bond matrix is successfully produced. Besides, the optimised sintering temperature curve, and strong magnetic field loading/unloading parameters are also obtained based on the orthogonal experiment design method; (3)To understand the superior performances of the produced wheel, theoretical modeling metholodgies for ground surface topography, grinding force, and grinding temperature considering grain-workpiece micro interactions are proposed, providing a theoretical approach to study the relationship between the observed superior performances and the unique wheel microstructure; (4)By performing large numbers of grinding experiments for both metals (#45 steel and Ti-alloy) and brittle materials (monocrystalline silicon and optical glass), the produced wheel is proved to be superior regarding machined surface quality, grinding force, and temperature, in comparison with two conventional vitrified CBN grinding wheels from two famous international companies. Key words: strong magnetic field, vitrified CBN grinding wheel, grinding, grinding modeling and simulation, nano-materials *This research is sponsored by: The National Natural Science Foundation of China (No. 51275084)