Research Of Tribological Performance Of Micro Modelling And Micro-nano Particle Filling Surface

More and more researchers study cylinder liner surface micro modelling,and make a certain progress on the micro modelling technology.In this paper,on the basis of the cylinder liner surface micro molding processing,fill serpentine and supramoly nanoparticles to surface micro pit,by friction and wear test,it has good antifriction and wear-resisting effect was verified.First of all,according to the characteristics of the cylinder liner-piston reciprocating motion,design two surface micro modelling schemes:all cylinder liner surface micro modelling and both ends of the cylinder liner surface micro modelling,choose serpentine and supramoly micro-nano particles,single and composite filling on mass ratio of 1:1,respectively in the oil-rich and boundary conditions,to explore the different effect of test scheme on the performance of antifriction and wear-resisting performence,at the same time observe and analysis the sample surface morphology and elemental composition by means of metallographic microscope,scanning electron microscope,X-ray fluorescence spectrometer,exploring the mechanism of antifriction and wear-resisting.By Friction and wear test of different time,obtain the change of the overflow ratio of micro-nano particles in cylinder liner surface micro pit.The experimental results show that:in the oil-rich condition,the same micro-nano particles filling,the friction coefficient of both ends of the cylinder liner surface micro modelling are less than all micro modelling scheme,the smallest friction coefficient is the scheme of both ends of cylinder liner surface micro modelling and serpentine and supramoly micro-nano particles composite filling,its friction coefficient is 0.0794,13.99%lower than mechanical honing surface of cylinder liner.In the boundary condition,the same micro-nano particles filling,anti-wear time of scheme of all micro modelling cylinder liner surface are greater than both ends of surface micro modelling scheme,the longest anti-wear time is the scheme of all micro modelling cylinder liner surface and serpentine and supramoly micro-nano particles composite filling,its anti-wear time is 2367s,85.79%higher than mechanical honing surface of cylinder liner.In different time of trials,overflow rate of micro-nano particles in the cylinder liner surface pit gradually declines over time and close to zero.And the surface of the cylinder liner which carried on the micro modelling and micro-nano particles filling is smooth,much better than the mechanical honing cylinder liner surface after wear.