Abstract
A paper is dedicated to the investigation of inertia impact upon coating adherence with the outer surface of revolution solids during coating application. The work purpose is a qualitative and qualitative assessment of factors of antifriction coating application affecting the parts of friction units of machines and units. The relevance is substantiated with that the strength increase of coating applied ensures life, reliability and power effectiveness of machines and mechanisms. The work novelty consists in the application of fundamental dependences and laws to actual manufacturing operations. Adhesion is a basic parameter charactering quality of the coating applied. Adhesion, in its turn, is characterized with adhesion strength and porosity of the coating applied. The material presented shows the impact of inertia acting upon particles of the coating applied at their falling on the outer surface of rotation. There are defined theoretical dependences describing the process mentioned. The analysis of these dependences shows that inertia can carry out both the positive and negative action during the application of antifriction coatings. To confirm the theoretical results obtained there were carried out experimental investigations. In the experiment took part some sets of samples upon which PRNH17SR4 antifriction coating was applied. Coating application was carried out with the aid of the Iskra-1 burner with the further fusing. For the qualitative and quantitative strength assessment of adhesion of the coating applied there was used a method for a shear test. The samples prepared were pressed through a matrix on the GMS-50 universal rupture-test machine. As a result of tests carried out there are obtained dependences characterizing adhesion of antifriction coating applied. The dependences obtained show efficient factors impacting the adhesion strength of coatings. By the results of theoretical and experimental investigations there are formulated qualitative and quantitative assessments of factors influencing the process of antifriction coating application on parts.
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