激光微织构化铝合金表面的摩擦磨损研究.

The aluminum alloy surfaces with circle-shaped micro cavities are fabricated by pulsed Nd : YAG laser. Under the conditions of sliding speed of 0. 15 m/s and 10 N load, a series of frictional experiments with uball- surface" friction pairs are conducted on a HSR-2M high-speed reciprocating friction and wear tester under the starved-oil lubrication condition. The influences of geometrical parameters of micro cavities on the surface of the circular cavity tribological properties are investigated. The influence of laser processing on the micro-hardness of aluminum alloy surface was analyzed and the wear characteristics o£ the test piece and the dual friction pair surface were studied by using the ultra-deep microscopy system. The results show that the micro-hardness of aluminum alloy substrates after laser processing is significantly improved. Under the starved-oil lubrication condition，the average friction coefficient of the micro-textured aluminum alloy surface is significantly reduced compared with the non-textured surface, and the fluctuation is more stable. According to the analysis of wear scar morphology, the surface wear of micro-textured aluminum alloy is reduced. When the diameter of the micro cavity is 60 pm and the areal density is 4. 91%，the surface o£ the micro-textured aluminum alloy has the best anti-friction and anti-wear properties. [ABSTRACT FROM AUTHOR]