Study of the impact of the method of drawing the quality of restorative coatings

Abstract

An integrated method of application of gas-flame coatings has been developed, which allows to improve the technological process of restoration of cylindrical surfaces of parts with simultaneous increase of their resource due to the improvement of quality indicators of spray coatings. Brush treatment is used to process the surface of the part under the application of coating and treatment of the spraying layers during the formation process, which ensures their microplastic deformation. It is established that the technological factors that influence the strength of grip and porosity, hardness of the spray coating are the structural and technological parameters of the brush. To obtain a generalized integrated quality assessment, it is proposed to use the average harmonic quality estimation of factors: bond strength, porosity and wear resistance. Comparative laboratory research performed on two technologies: traditional and integrated, showed that the quality of coverage of the latter is higher by 26%. The method of forming a wear-resistant surface by gas-flame spraying, integrated with brush treatment has been developed. It was established that the technological factors influence the adhesion and cohesive bonding strength of the coating coating with the basis are structural and technological parameters of the brush. It is proposed to use a generalized integral assessment of the quality of the coating coating as an average harmonious quality assessment of the factors: bond strength, porosity and wear resistance. In order to provide indicators that characterize the quality of the coating, a method of forming a wear-resistant surface by gas-flame spraying, an integrated-bath with a brush treatment is developed. On the basis of the study of kinetics and the mechanism of coating formation, as well as theoretical and experimental evaluation of the processes occurring when brushing the treated spray layers, it has been established that the technological factors affect the adhesion and cohesive bonding strength of the coating coating with the base are structural and technological parameters brushes The obtained results of dosage-recommend to recommend an integrated technology of gas-fired coatings for the recovery and strengthening of parts of vehicles such as shaft.