蛇纹石对不同粗糙度45~#钢表面的减摩行为

利用MMW-1A型万能摩擦磨损试验机研究蛇纹石对3种不同粗糙度45#钢表面的减摩行为。采用三维视频显微镜、扫描电子显微镜和能谱仪对实验前后磨损表面形貌和化学组成进行分析。结果表明：蛇纹石的减摩效果对于光滑磨损表面更为显著。当表面粗糙度Ra=0.742μm时,磨损表面被有效修复,摩擦系数大幅下降,表面粗糙度下降了72.1%,并且磨损量仅有1.3mg;当Ra=1.424μm和3.706μm时,摩擦副磨损遵循一般金属材料的磨损特征。修复层平整光滑,其形成与磨损存在一个动态平衡。

Friction-Reducing Performance of Serpentine on 45# Carbon Steel Surfaces with Different Roughnesses

The 45# carbon steel pair surfaces with three different roughnesses were prepared.The friction-reducing performance of serpentine on the three surfaces was investigated by an MMW-1A universal friction and wear tester.The worn surfaces were analyzed by three-dimensional video microscopy,scanning electron microscopy and energy dispersive spectroscopy,respectively.The results show that the friction-reducing effect of serpentine is more remarkable to smooth surface.When the surface roughness Ra was 0.742 μm,the worn surface was repaired effectively,the friction coefficient was decreased,the wear mass loss was no more than 1.3 mg,and the surface roughness was reduced by 72.1%.Nevertheless,the friction and wear behavior obeyed the wear feature of normal metallic materials when the Ra was 1.424 and 3.706 μm.The self-repairing film could smooth the worn surface,and there was a dy-namical equilibrium between wear and the formation of self-repairing film.