Parameters & Performance Of Coating For High Velocity Arc Spray Metal Composite Ceramic Coating Of Boride

Surface engineering technology is the important part of the advanced manufacture technology, and which afford technology support innovation of the advanced manufacture technology. Surface engineering technology is particular advantage on surface protected, surface repair, changing the performance of surface etc. High Velocity Arc spraying is one of surface engineering technology, with the development of thermal spraying technique and materials, High Velocity Arc spraying coating extend the range of material applications, enhance the work life of parts, saving the sources.Aimed at the actual works in the curing cycle bed boiler erosion of the surface wear resistance requirements, researching the technique, material and supporting technology of High Velocity Arc spray. Used Q235 steel as basic material, select the HDS-88A wear-resistance high-wire material, and its basis: ceramic composite metal borides, Ni, Cr, Al, thulium. Adopt the High Velocity Arc spraying the coating on the Q235 steel.Make sure the current,voltage and distance of the High Velocity Arc spraying under the method of orthogonal design theory, and the current,voltage and distance impact of wear, hardness and tiny-hole of coating.MM200 respectively use friction and wear test machine and MLS-225 wet-sand rubber wear tester of composite ceramic coating metal borides in the dry friction conditions and erosion wear under conditions of the experiments wear, the result indicate that the coating's wear-resistance under the dry friction much better than under the erosion friction.The hardness of coating also be tested under Huayin Vickers hardness-HV-1000, and the tiny-hole of coating be tested under DT200 image analysis software and metallographic microscope XJ100.The use of mathematical statistics, through orthogonal design to determine the appropriate parameters, the establishment of quadratic regression methods, and established the Spraying current, voltage, and distance and wear between the mathematical model and identify the best process parameters. The research of experiments indicate that High Velocity Arc spraying metal borides composite ceramic coating quality is good and has good wear resistance, the use of mathematical statistics.