Effect Of Surface Texturing On The Tribological Property Under High Load-Line Contact And Rolling-sliding Conditions

High load and line contact frictional pair is relatively widely applied in practical engineering application. But this application faces severe challenge for the extreme operating condition and poor working environment, such as narrow contact area, huge contact stress and easy to be wear. Research scholars at home and abroad attempted to find new materials or technologies to solve this problem by conducting a large number of experiments.Recently has been widely researched technology, surface texturing, provide a new prospect for solving the problem. This study used laser marker YLP-F10 to texture the circumferential surface of five specimens to make a circle of regular and uniform micro-pits. These surfaces with micro texture have same area density and Sa.The depth of five specimens’pits is about 2 μm and the diameter varies from 20 μm to 80 μm. Then all the textured surfaces are measured by non-contact 3 D optical profiler Talysurf CCI Lite and characterized by ISO 25178 3 D characterization parameters to get 30 parameters. At last, using a specimen for high load, a series of rich oil frictional experiments are conducted on a self-modified JPM-1 two-disc tribo-tester. Adjust the test load to make the hertzian contact pressure of the friction pair greater than 1 GPa. Change the load, rotate speed and sliding-rolling ratio and measure the frictional coefficient respectively. By comparing the analysis of experimental results we find that all specimens have same changing rules of frictional coefficient in different working condition as the load, rotate speed and sliding-rolling ratio change. Changing rule of the frictional coefficient as a certain factor is not exactly the same in different working condition. We find frictional coefficient is influenced by many 3 D characterization parameters by study the relevance of coefficient and 5 types 3 D characterization parameters. Study result confirms that well-designed texture surface can improve lubricating efficiency and reduce friction in any working condition. This research provide some reference for friction pair design of high load and line contact in large engineering applications.