CVD TiC-TiN复合涂层球/Pb基固体润滑盘摩擦学性能的研究

Study on the Tribological Properties of CVD TiC-TiN Composite Coating Ball against Electroplating Lead-Base Coating Disk

本文对球(包括CVD TiC-TiN复合涂层球和GCr15钢球)盘(包括纯Pb与Pb-Sn-Cu电刷镀层盘)滑动摩擦副进行了摩擦与磨损试验。结果表明,真空下的摩擦系数比大气下的低,涂层球的摩擦系数比钢球的低,Pb-Sn-Cu涂层盘的摩擦系数比Pb涂层盘的低。磨损表面的扫描电镜观测发现,在CVD涂层破裂区的后沿形成了固体润滑转移膜,这有助于降低摩擦和磨损。磨损表面的俄歇电子能谱分析表明,在油润滑及干摩擦下,盘的磨痕处仍有可起润滑作用的固体润滑膜存在。这种膜含有Fe元素,表明它是摩擦表面作用后产生的。

The friction and wear properties of ball (including hard TiC-TiN composite coating ball and GCr15 steel ball) and disk (including pure Pb and Pb-Sn-Cu brush electroplating disk) have been investigated in vacuum 6. 67 × 13 3 Pa and air, with or without vacuum-oil lubricant in this pa per. The results shown that: ( 1 ) There exists lower sliding friction coefficient μ in vacuum than in air. (2) μ is lower for CVD TiC-TiN coating ball than for bearing steel ball. (3) μ is also lower for Pb-Sn-Gu alloy coating disk than for pure Pb coating disk , both are very much lower than that of un-coated steel disk. Scanning electron microscopy (SEM ) proved that the transfer solid lubrication film were formed at the back of worn region on CVD TiC-TiN coating, it assisted in decreasing friction and wear. The Auger electron spectroscopy (AES) also proved that the thin solid lubrication film still remained in wear track on Pb-base coating disk , so the lubrication action was also remained. But there is Fe element in this thin film, it is resulted from the mutual action between two friction surfaces.