基于自润滑C（Cr，N）镀层钢球轴承的速度性能研究

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The self-lubricating C（Cr, N） coatings was deposited on bearing steel ball surface by means of an closed-field unbalanced magnetron sputtering ion plating technique. An 6204 bearing was used for the bearing experimental work. The microstructure and chemical compositions of the coatings were observed and analysed by the scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. Its adhesion, hard- ness, toughness and friction behaviors was tested, and the speed performance and self-lubricating properties of coated bearing and uncoated bearing were also tested by an high-performance bearing testing machine, and also been comparatived analysis. The results show that the C（Cr,N） coatings working-layer has better mierostruc- ture and comprehensively mechanical properties. And compared to the uncoated hearing, the coatings signifi- cantly reduces the value of bearing vibration, the coated bearing greatly improves high speed performance and self lubricating properties.应用非平衡磁控溅射离子镀技术在6204轴承钢球表面制备出自润滑C（Cr，N）镀层。运用扫描电子显微镜和透射电子显微镜对镀层的微观结构进行了观察分析；测试了镀层的结合强度、硬度、韧性及摩擦特性；用高性能轴承试验台对镀层钢球轴承和无镀层轴承的速度性能及其自润滑性能进行了实验，并对其给予对比分析。研究结果表明，制备的C（Cr，N）镀层具有良好的微观结构和综合的机械性能；与无镀层轴承相比，镀层明显减小了轴承的振动，极大地提高了轴承的高速性能和自润滑性能。