HVAS硼化物金属复合陶瓷涂层性能与工艺参数研-机械设计及理论专业毕业论文.docx

ABSTRACT ABSTRACT 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 Q23 5 steel as basic material，select the HDS一88A wear-resistance high-wire material，and its basis：ceramic composite metal borides，Ni，Cr,AI，thulium．Adopt the Hi曲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-I 000， and the tiny—hole of coating be tested under DT200 image analysis software and metallographic microscope XJ l 00． 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 II  ABST