Method for enhancing anti-fatigue performance of coating

Abstract

The present invention provides a method for enhancing the anti-fatigue performance of coating. The method enhances the anti-fatigue performance of coating by producing light and dark phases with certain thickness inside of the coating, texturing of matrix surface, texturing of coating surface, and the combination thereof.

1 . A method for enhancing the anti-fatigue performance of coating by controlling the internal structure of the coating, wherein the method comprises spraying a matrix using a supersonic plasma spraying process; and adjusting the spraying process parameters constantly during the spraying process such that the entire coating possesses spacing structures of light and dark layers with certain thickness. 
     
     
         2 . The method according to  claim 1 , wherein the matrix used in the method is further subjected to cleaning and polishing treatment. 
     
     
         3 . The method according to  claim 1 , wherein the coating selected for spraying is NiCrBSi ceramic coating, which is a sprayed coating with a thickness of 100 μm obtained by the supersonic plasma spraying, and wherein the particle size of NiCrBSi powder is from 50 to 60 μm. 
     
     
         4 . The method according to  claim 1 , wherein the spraying process uses a spraying power of 45-85 kW; for the black layer, the spraying distance is 80-140 mm and the spraying speed is 6-10 g/min; and for the white layer, the spraying distance is 120-160 mm and the spraying speed is 9-12 g/min. 
     
     
         5 . The method according to  claim 1 , wherein the thickness of the white layer is 4-6 μm, and the thickness of the black layer is 2-7 μm. 
     
     
         6 . A method for enhancing the anti-fatigue performance of coating, wherein the method comprises the following steps:
 (1) spraying a matrix using a supersonic plasma spraying process; and   (2) subjecting a coating surface obtained in step (1) to texturing treatment using a laser process,   wherein the method is carried out by preparing textured patterns with different geometrical morphologies on a surface of sprayed coating by biological bionics simulation.   
     
     
         7 . The method according to  claim 6 , wherein the spraying in step (1) employs the following process parameters: spraying voltage 120 V, spraying current 440 A, spraying power 55 kW, and spraying distance 100 mm. 
     
     
         8 . The method according to  claim 6 , wherein the laser process in step (2) employs the following process parameters: laser power 80-120 W, scanning speed 600-900 mm/s, and frequency 15-25 HZ. 
     
     
         9 . A method for enhancing the bonding strength of coating, wherein the method comprises the following steps:
 (1) preparing textured patterns on a matrix surface using a laser process; and   (2) subjecting the matrix obtained in step (1) to spraying using a supersonic plasma spraying process;   wherein the method is carried out by preparing the textured patterns on the matrix surface by biological bionics simulation, and then preparing the coating on the matrix surface with the textured patterns.   
     
     
         10 . A method for enhancing the fatigue strength of coating by double-layer texture coupling effect, wherein the method includes the following steps:
 (1) preparing textured patterns on a matrix surface using a laser process;   (2) subjecting the matrix obtained in step (1) to spraying using a supersonic plasma spraying process; and   (3) subjecting the coating surface obtained in step (2) to texturing treatment using a laser process;   wherein the method is carried out by preparing the textured patterns on the matrix surface and the coating surface by biological bionics simulation.   
     
     
         11 . A method for enhancing contact fatigue performance by optimized combination of texturing and coating process, wherein the method comprises the following steps:
 (1) spraying a matrix using a supersonic plasma spraying process; and adjusting the spraying process parameters constantly during the spraying process such that the entire coating possesses spacing structures of light and dark layers with certain thickness; and   (2) subjecting the coating surface to texturing treatment using a laser process;   wherein the method is carried out by controlling the parameters during the spraying process such that the sprayed coating possesses certain spacing structures of light and dark layers, and then preparing textured patterns with different morphologies on a surface of sprayed coating by biological bionics simulation.   
     
     
         12 . A method for enhancing the anti-fatigue performance of coating by the coupling effect of three-layer patterning, wherein the method comprises the following steps:
 (1) subjecting a matrix surface to texturing treatment using a laser process;   (2) spraying the matrix using a supersonic plasma spraying process;   (3) adjusting the parameters during the spraying process such that the coating possesses certain spacing structures of light and dark layers; and   (4) subjecting the coating surface to texturing treatment using a laser process;   wherein the method is carried out by preparing textured patterns on a matrix surface and a coating surface through biological bionics simulation; and controlling the parameters during the spraying process such that the internal part of the coating possesses light and dark phases with certain thickness; and wherein the anti-fatigue performance of the coating is improved by the mutual coupling effect of texturing of matrix surface, the thickness of the pattern of light and dark phase of the coating and texturing of surface.   
     
     
         13 . A textured pattern capable of effectively enhancing the anti-fatigue performance of sprayed coating, wherein the textured pattern is one or more of round, triangle, hexagon, groove shape, grid shape, arrow shape or stripe shape.