微织构自润滑表面在油介质中的摩擦学性能

为探究不同表面处理方式对试样表面摩擦学性能的影响,分别对GCr15试样表面进行激光微织构加工,光滑表面涂抹润滑油,微织构表面填充固体润滑剂,微织构表面涂抹润滑油,微织构表面填充固体润滑剂并涂抹润滑油等不同表面处理方式,在MMW-1A摩擦磨损机上进行摩擦磨损试验。同时改变试验的载荷及转速,探究在不同转速和载荷工况下,不同表面处理方式对试样摩擦因数的影响。结果表明,在干摩擦条件下,试样表面采用微织构处理并填涂固体润滑剂可使摩擦因数较光滑表面降低47.6%;在油介质中,采用微织构处理可使摩擦因数较光滑表面降低4.8%,采用微织构处理并填充固体润滑剂可使摩擦因数较光滑表面降低17.7%。且在油介质中,采用织构化处理和固体润滑结合的表面处理方法,试样摩擦因数随载荷增大而减少且逐渐趋于稳定,但随转速增大而增大。

Tribological Properties of Micro-textured Self-lubricating Surface in Oil Medium

The effect of different surface treatments on the tribological properties of GCr15 bearing material was investigated. Friction and wear tests by using MMW-1A friction and wear machine were conducted on the smooth surfaces, which are smooth surface lubricated with oil, micro textured surface filled with solid lubricant, micro textured surface lubricated with oil, micro textured surface filled with solid lubricant and lubricated with oil. The influence in variation of rotational speed and load on the tribological properties of the different surface treatment was also studied. Results show that the micro textured surface filled solid lubricant reduces the friction coefficient by 47.6% compared with that of the smooth surface under dry friction condition. In the oil medium, compared with the smooth surface, the micro textured surface reduces the friction coefficient by 4.8%, while the micro textured surface filled with solid lubricant reduces the friction coefficient by 17.7%. In the oil medium, the friction coefficient of the sample decreases first with the increase of the load and then gradually stabilizes with the surface treatment method, which is combined with micro texturing and solid lubrication. Moreover, the friction coefficient increases with the increase of the rotational speed.