Physical and Mathematical Modeling of a Surface for Plasma Spraying of Wear-Resistant Coatings

Abstract

This article examines, using the theory of similarity and dimensionality, the surface of a part of bodies of revolution before plasma spraying of wear-resistant coatings, which plays an important role in activating the processes of bonding between the sprayed particles and the surface of the part. Physical processes of the interaction of the surface of the part before plasma spraying of wear-resistant coatings with a thermo-abrasive jet are considered. For physical and mathematical modeling, the following parameters were used: the average particle diameter, the average density of the material of the part, the density of the material of the particle, the path traveled by the particle, the initial velocity of the particle, the acceleration of the particle, and the impact strength of the metal, to reflect the process of motion of the abrasive particle in the thermo-abrasive jet. A regression equation was obtained, and the maximum energy of an abrasive particle, which will be supplied at an angle of inclination relative to the part, and the sum of particle velocities corresponding to these parameters, depending on the angle of inclination at the moment of impact, were determined.