Study On The Manufacturing Technology Of Copper-based Bionic Anti-friction And Wear-resistant Surface

Copper alloy is the most important metal type except steel and aluminum alloy,which is widely used in various industries and fields because of its good characteristics.In the process of work,the surface of the copper alloy often bears a large impact force and friction force,resulting in the wear of the copper-based surface,which seriously affects the working performance and service life of the parts,and causes the waste of energy and materials.In this paper,the wear resistance of copper surface was studied.Based on the principle of bionics,this paper explores the influence of the process parameters of electrodeposition and plasma spraying on the wear resistance,analyzes the performance of wear-resistant coating and determines the optimal preparation process,which has practical application value and significance for improving the wear resistance of copper base surface.In this paper,based on a large number of references at home and abroad,the conch shell,scallop shell and cloth back plate with good wear resistance are selected as biological prototypes,and the shape of the copper-based surface bionic cell body is convex,striped,concave Pit shape.The finite element analysis method was used to conduct dynamic contact optimization analysis of the bionic unit body specimen.The size and spacing of the bionic unit were taken as parameters,and the total deformation of the bionic specimen was taken as the optimization objective.It is determined that the length of convex block unit is 3.5mm,the width is 3mm,and the interval between units is 3mm;the width of stripe unit is 3mm,and the interval between units is 3mm;the diameter of pit unit is 3mm,and the interval between units is 5mm.The optimum technological parameters of electrodeposition nickel plating were determined by regression orthogonal experiment.The regression equation between the experimental factors and the amount of wear was established by taking the current density,solution PH value and deposition time as the experimental factors and the amount of wear as the experimental index,and the relationship between the experimental factors and the amount of wear was analyzed.The results showed that:the relationship between the wear amount and the wear amount of the pit specimen was always the wear amount of the striated specimen<the wear amount of the convex specimen,so the wear resistance of the pit specimen was the best,and the minimum wear amount was 8.9951mg when the current density was 67mA/cm,the PH value of the solution was 3.6,and the deposition time was 7.3h.The optimum technological parameters of nickel coating prepared by plasma spraying were determined by regression orthogonal experiment.Taking spraying power,spraying distance and powder feeding rate as the experimental factors,and the amount of wear as the experimental index,the regression equation between the experimental factors and the amount of wear was established,and the relationship between the experimental factors and the amount of wear was analyzed.The results showed that:the relationship between the wear amount and the wear amount of the pit specimen was always the wear amount of the striated specimen<the wear amount of the convex block specimen.Therefore,the wear resistance of the pit specimen was the best,and the minimum wear amount was 3.7786mg when the spraying power was 27.625kw,the spraying distance was 90mm,and the powder feeding speed was 30g/min.The performance analysis of the copper base component without any treatment and the wear-resistant coating with the optimal unit shape and process parameters obtained by electrodeposition and plasma spraying is carried out.The average wear amount of electrodeposition experiment is 9.0889mg,and the average wear amount of plasma spraying is 3.8667mg,which is not much different from the theoretical value.The wear amount of copper-based original parts is 26.9667mg,and the wear resistance is improved.Through the performance comparison and analysis of the micro hardness(Plasma spraying method 724.9HV?739.4HV>electrodeposition method 224.6HV?233.4HV),wear amount(Plasma spraying method 3.7333mg?4.1mg<electrodeposition method 8.6667mg?9.4667mg),friction wear micro surface and friction coefficient of the wear surface(Plasma spraying method 0.31?0.33<electrodeposition method 0.34?0.36),it is determined that the plasma spraying method can improve the wear resistance of the copper-based surface more.