为了探究不同基体表面粗糙度对非晶碳薄膜摩擦磨损性能的影响，改善2Cr13试样表面在601EF润滑脂润滑下的摩擦学性能，使用机加工、抛光等方式在2Cr13试样表面制备不同的表面粗糙度，然后采用磁控溅射法在不同粗糙度样件表面制备非晶碳薄膜，采用球-盘接触的摩擦磨损试验研究了在601EF润滑脂润滑条件下非晶碳薄膜及氮化硅球的摩擦磨损性能，通过光学显微镜对磨损处进行分析。结果表明：与基体表面对摩的Si3N4球均磨出了明显的平台，而基体表面并未出现明显的磨痕，Ra范围在0.20～0.75μm样品对偶球的磨损量要小，磨斑面积范围为0.152～0.165 mm2,磨损形式为黏着磨损，Ra范围在0.95～3.19μm样品对偶球的磨损量要大，磨斑面积范围为0.228～0.275 mm2,出现了犁沟状磨痕，磨损较为严重；在相同的工况条件下，随着基体表面粗糙度的增大，两摩擦副间的启动、平均摩擦系数以及Si3N4球的磨损量均呈先减小后增大再减小的趋势，当Ra为0.56μm时，非晶碳薄膜的摩擦学性能最好，摩擦系数曲线较为稳定，平均摩擦系数为0.162,其对偶球磨损量最小，为0.152 mm2。基体表面粗糙度影响非晶碳薄膜的摩擦学性能，通过机加工、抛光等手段在基体表面制备合适的粗糙度可以得到具有良好减摩性能的表面。
In order to investigate the effect of different substrate surface roughness on the friction and wear properties of amorphous carbon films, and improve the tribological properties of the 2Cr13 sample surface under 601EF lubricating grease lubrication, the methods such as machining, polishing and other techniques were employed to prepare different surface roughness on the surface of 2Cr13 samples. Subsequently, amorphous carbon thin films were prepared on the surface of samples with different roughness by magnetron sputtering. The friction and wear properties of amorphous carbon films and silicon nitride balls under 601EF lubricating grease lubrication were investigated through ball-disc contact friction and wear tests, and the wear places were analyzed by optical microscopy. Results showed that the Si3N4 balls that rubbed against the substrate surface all presented a clear platform, while the substrate surface did not display any obvious grinding marks. The samples with the Ra range of 0.20～0.75 μm on the coupling ball had the smaller wear amount, the wear spot area range was 0.152～0.165 mm2, and the wear form was adhesive wear. By contrast, the samples with the Ra range of 0.95～3.19 μm had more wear amount on the coupling ball, the wear spot area ranging from 0.228～0.275 mm2, and there were furrow-like wear marks, which indicated more serious wear. Under the same operating conditions, as the surface roughness of the substrate increased, the starting and average friction coefficients between the two friction pairs, as well as the wear amount of Si3N4 balls, all showed a trend of first decreasing, then increasing, and then decreasing. When the Ra was 0.56 μm, the tribological performance of the amorphous carbon film was the best, and the friction curve was relatively stable, with an average friction coefficient of 0.162, and the wear amount of its coupling ball was the smallest, 0.152 mm2. In general, the surface roughness of the substrate affected the tribological performance of amorphous carbon films, and the surface with good anti friction properties could be obtained by preparing appropriate roughness on the substrate surface via the means of machining, polishing, etc.
