表面织构对重载线接触条件下40Cr钢摩擦性能的影响  

Effect of Textured Surface on the Frictional Property of 40Cr Steel under High Load and Line Contact

作　　者：董帮源 刘小君[1] 王静[1] 刘焜[1] 

机构地区：[1]合肥工业大学摩擦学研究所,安徽合肥230009

出　　处：《摩擦学学报》2016年第2期145-152,共8页Tribology

基　　金：国家自然科学基金项目(51375132;11472096);中央高校基本科研业务费专项资金资助~~

摘　　要：利用激光微造型技术在环形试样表面加工出直径在20μm到80μm之间,且具有相同深度和面积占有率的圆凹坑,通过Talysurf CCI Lite非接触式三维光学轮廓仪测量试样表面,并采用ISO 25178参数对各试样表面进行三维表征,最后利用JPM-1双盘磨损试验机,在重载条件下(赫兹接触压力≥1 GPa)研究各组试样在不同工况下的摩擦特性及表面三维形貌参数对摩擦学性能的影响.试验结果说明:直径为80μm和20μm的织构表面润滑效果优于光滑表面.载荷、转速、滑滚比对摩擦系数的影响具有一定的规律性,且不同的工况下呈现的规律有所差别,在高速低载大滑滚比条件下,织构表面对提高摩擦副润滑效果最为显著,还进一步探索了表面三维表征参数Sa、Vv、Spc、Vmp、Vxp与重载条件下40Cr钢摩擦特性的关系.The same depth and area density of micro-texture with diameter varying from 20 μm to 80 μm were designed and manufactured by laser surface texturing on the surface of 40 Cr steel. All the surfaces were measured by using noncontact 3D optical profiler Talysurf CCI Lite and characterized by ISO 25178. This study conducted a series of frictional experiments on a JPM-1 two-disc tribo-tester under heavy load（hertzian contact pressure greater than 1 GPa）. The frictional property of these specimens and the influence of 3D characterization parameters of the surface morphology to tribological performance was studied in different operating conditions. It is found that the micro-texture surfaces with diameters of 20 μm and 80 μm had advantage over smooth surface in friction reduction under lubrication. The influences of load, rotational speed, sliding-rolling to friction coefficient were different. The effect of micro-texture was the most pronounced under low load, high rotating speed and slip ratio. In addition, the relationship between frictional property of40 Cr and 3D characterization parameters（e.g Sa、Vv、Spc、Vmp、Sxp） were investigated under heavy load.

关 键 词：重载 线接触 微织构 三维表征 摩擦特性 表面形貌 

分 类 号：TH117[机械工程—机械设计及理论]