Research On The Manufacture And Characterization Of Multi-scale Surface Topography And Its Effect On Frictional Property

Improving frictional properties and lubricating properties of the surface by usingsurface morphology, has become a hot topic in academic research of Tribology, whichScholars at home and abroad have given a great deal of focus on. In order to study themanufacture, characterization and frictional property of multi-scale microscopic surfacetopography,32multi-scale surfaces with different morphologies are designed andmanufactured using a combination of grinding and laser-processing. All the surfaces arescanned and measured by non-contact3D optical profiler Wyko NT1000, then thescanned images are separated using mathematical morphology method and surfaces arecharacterized by the3D characterization parameters. A series of oil frictionalexperiments are conducted on micro-friction tester, and the friction coefficients aremeasured. The results of multi-scale separation show that the multi-scale surface can beseparated into two different functional components（the texture morphology by grindingand the micro-pits morphology by laser surface micro-texturing）, respectively, whichare bearing and lubricating role; The3D characterization parameters of the surfacemorphology have certain relevance with surface microstructure features. The results offriction test show the optimal process parameter combination of comprehensiveprocessing and the factors’ order（initial abrasive sandpaper thickness#-diameter ofmicro-modeling D-depth of micro-modeling H-area ratio of micro-modeling A）; Thefrictional characteristics of multi-scale surface can be impacted by comprehensiveprocessing conditions such as the depth, the diameter, the area ratio of themicro-modeling and the thickness of the initial abrasive sandpaper, and the specimens’processing parameters of each section of friction coefficient are obtained. Multi-scalesurface morphology can improve the frictional property of the part surface, therefore toexplore the manufacture, characterization and frictional property of multi-scale surfacetopography is great significant.