激光微造型表面固体润滑性能研究

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采用声光调Q二极管泵浦固体光源（DPSS）Nd：YAG激光器，在45#钢试样表面进行表面微造型加工。以聚酰亚胺（PI）和二硫化钼（MoS2）复合固体润滑材料作为固体润滑剂，通过两步加温固化黏结工艺成功制备微造型固体润滑试样。在MMW-1A型摩擦磨损试验机上进行光滑无润滑试样、光滑表面固体润滑试样和微造型固体润滑试样的摩擦性能对比试验，以及微造型固体润滑试样在不同转速和压力下的摩擦性能试验。结果表明，在经过激光加工的微凹坑中填充复合固体润滑材料的试样，在摩擦过程中微凹坑中填充的固体润滑材料能有效转移到在摩擦表面，补充消耗掉的润滑材料，因而表现出更好的摩擦学性能。 Laser surface micro-machining technology was adopted to machine surface of 45# steel sample based on Q switched diode-pumped solid-state （DPSS）Nd：YAG laser. Prepared micro-dimples sample was filled with solid lubrication of PI/MoS2 composite by two-step heat-curing bonding process. Friction tests under ground surface with dry friction, ground surface with solid lubrication and micro-dimples filled with solid lubrication were performed using a MMW-1 A friction and wear tester, and the tribological properties of micro-dimple sample under different speed and pressure were researched. It is found that the sample with micro-dimples which were refilled with PI/MoS2 composite shows better friction-reduction performance, because the solid lubrication composite in the dimples effectively transferred to the friction surface in the friction process ,which supplemented the consumed lubricating composite.