水润滑下偶件表面粗糙度对PTFE复合材料摩擦学性能的影响

Effect of the Surface Roughness of Matching Material on Tribological Properties of PTFE Composites under Water Lubrication

通过水润滑下的摩擦磨损实验,研究了偶件表面粗糙度对MoS2/PTFE复合材料摩擦学性能的影响,分析了在不同的偶件表面粗糙度下的摩擦学行为。实验结果表明:在水润滑下,一般存在着一个较佳的偶件表面粗糙度范围,在这个范围内可以取得较低的摩擦因数和磨损率;当偶件表面粗糙度高于这个范围时,摩擦磨损机制主要是机械作用;而当偶件表面粗糙度低于这个范围时,则主要是由于分子作用导致摩擦磨损。即当偶件表面粗糙度超出某一范围时,摩擦磨损行为将发生转变。

Effect of the surface roughness of matching material on the tribological properties of FTFE composites under water lubrication was investigated on pin-on-disk tester. Friction and wear behaviors of composites were analyzed under different surface roughness. It is found that there exists the optima surface roughness in which the lower friction coefficient and wear rate are obtained. The friction surfaces are characterized by mechanical effect to a degree, which corresponds to a relatively high surface roughness. The friction surfaces are dominated by molecular action, which corresponds to a small surface roughness. Therefore, the primarily controlling factors of different friction and wear behavior are varied with surface roughness, that is to say, the surface roughness of matching material results in transformation of friction and wear behavior.