轴承钢球离心摆动式富氮强化研磨高效加工机理研究

钢球是轴承中最关键的零件，其加工效率、一致性和表面物理性能影响轴承制造的水平、质量及可靠性。本项目以我国高端装备发展对高性能轴承的迫切重大需求为牵引，针对钢球制造中强化加工效率不高、一致性不高、强化层机械物理性能不高等“三高”问题，原创提出钢球“离心摆动式富氮强化研磨”高效高质量加工的新原理、新方法，将钢球表面设计成带有“表面类织构层、氮-金属络合物表面强化层”的双层复合微结构，通过强化研磨加工，使钢球表层获得理想的强化层和残余压应力状态与减摩类织构，并提高钢球的压碎负荷和加工效率与一致性。研究钢球强化研磨过程的动力学分析与建模、富氮强化层的形成机制、表面织构的创成过程等科学问题，突破钢球强化研磨工艺优化关键技术，形成基于离心摆动式富氮强化研磨轴承钢球高效加工新理论、新技术，突破我国高端装备高性能轴承对高质量钢球需求的瓶颈，对高质量、高可靠、长寿命轴承绿色设计与制造技术的发展具有重要意义。

The steel ball is the most critical part in the bearing, and its processing efficiency, consistency and surface physical properties affect the level, quality and reliability of the bearing manufacturing. This project draws on the urgent and important demand for high-performance bearings in the development of high-end equipment in China. In response to the “three high”problems of low processing efficiency, low consistency, and low mechanical properties of the steel ball manufacturing, Originally proposed new principles and new methods for high-efficiency and high-quality processing of steel balls “centrifugal swing nitrogen strengthening grinding”, the surface of the steel ball is designed as a double-layer composite microstructure with a “surface-like texture layer and a nitrogen-metal complex surface strengthening layer”. By the strengthening grinding process, the steel ball surface layer obtains the ideal strengthening layer and residual compressive stress state and friction-reducing texture, and improve the crushing load and processing efficiency and consistency of steel balls. through the strengthening grinding process, makes the steel ball surface layer obtain the ideal strengthening layer and residual compressive stress state and anti-friction texture, and improve the crushing load of the steel ball and the processing efficiency and consistency. Research on the dynamic analysis and modeling of steel ball strengthening grinding process, the formation mechanism of nitrogen-enriched strengthening layer, the creation process of surface texture, etc., break through the key technology optimization of steel ball strengthening grinding process, and form a nitrogen enrichment based on centrifugal swing new theories and technologies to enhance the efficient processing of milled bearing steel balls and break through the bottleneck for high-quality steel balls in China's high-end equipment and high-performance bearings are of great significance to the development of green design and manufacturing technologies for high-quality, high-reliability and long-life bearings.