Frictional properties of wedge-shaped weaves on 3D-printed cast aluminum alloy surfaces
In this experiment,cast aluminum alloy(AlSi10Mg),which is a more used material for piston-cylin-der liners,was 3D printed to study its friction and wear proper.Under the actual operating conditions of an in-ternal combustion engine,the piston skirt is usually subjected to severe friction and wear.Surface weaving has become one of the effective ways of modern friction and wear reduction and has been successfully applied in many fields.Two kinds of specimens with different area occupancy wedge-shaped crater surface and smooth sur-face specimens were processed by 3D printing technology.The pin-disk rotary test was conducted on a vertical universal friction and wear tester,and the wear morphology of the working surface of the specimen was ob-served by a three-dimensional morphometric,a coaxial microscope,and a scanning electron microscope.The in-ternal pressure of the lubricant is simulated by Fluent fluid analysis software and the simulation results are veri-fied.The results show that the wedge-shaped weave specimen has a positive effect on improving the tribological performance of the piston skirt compared with the smooth non-weave specimen,and the effect on reducing the friction coefficient and lowering the wear quality is more significant when the weave area occupancy is 7.01％,which improves the tribological performance of the piston skirt.
3D printing of cast aluminum alloyswedge structuringfluid simulation analysisfriction and wear
万方数据
维普
