Cylinder Liner-piston Ring Micro Modelling And Micro/Nano Particle Composite Filling Technology Research

This paper is based on the micro modeling of cylinder liner and piston ring, by adding the combination of micro and nano particles of silicon carbide and serpentine to explore the tribological performance of piston ring and cylinder and the mechanism of the composite particles.Firstly, the combinations of micro and nano particles of silicon carbide and serpentine under different composite are prepared by the ball-milling, then fill the micro modeling cylinder liner and piston ring with it, and finally, test the influence of different composite scheme on tribological performance of piston ring and cylinder, comparing to the single micro and nano particles filling and mechanical honing, to determine the best composite scheme. After testing, the surface morphology and composition of the cylinder samples before and after the friction and wear are characterized by using scanning electron microscope, to expound the synergy mechanism of the composite particles.The results of the test show that when only filling the micro modeling piston ring, it is the best composite scheme when composite time is 6h, and the ratio of composite particles is 1:2. This moment, friction coefficient is about 0.09576, wear is 8.3 mg, and anti-adhesion wear time is 1943s. Comparing to the single micro and nano particles filling and mechanical honing, its friction coefficient is reduced by 5.1% and 17.3%, its wear is reduced by 15.3% and 52.8%, and its anti-adhesion wear time is extended by 21.1% and 93.5%; when filling the micro modeling cylinder liner and piston ring, it is the best composite scheme when composite time is 6h, and the ratio of composite particles is 1:1. This moment, friction coefficient is about 0.0886, wear is 6.6 mg, and anti-adhesion wear time is 3658s. Comparing to the single micro and nano particles filling and mechanical honing, its friction coefficient is reduced by 3.6% and 24.3%, its wear is reduced by 13.1% and 62.5%, its anti-adhesion wear time is extended by 24.8% and 264.3%, and the worn surface of the samples is significant smooth.