DOI: 10.18503/1995-2732-2023-21-4-148-156
Abstract
Problem Statement. The paper presents the results of modeling the process of cold gas dynamic spraying of powder coatings. This process involves the deformation of metal particles by high-speed collision with a solid surface. The complexity of the interaction between particles and the substrate, when varying the parameters of the cold gas dynamic spraying process, contributes to using the mathematical modeling to predict the possibility of forming coatings. Objectives. The research is aimed at developing the mathematical model of gas flow and particle movement during cold gas dynamic spraying, factoring into the peculiarities of existing areas of gas flow and the size of powder particles. Methods Applied. Isentropic formulas were used to calculate the gas parameters inside the de Laval nozzle; the sprayed particle parameters were calculated, factoring into the values of the Mach number and the Reynolds number. Originality. The authors developed the mathematical model of the movement of gas flow in the process of cold gas dynamic spraying. This model is used to calculate accurately the gas consumption in short, well-contoured nozzles with a converging subsonic flow. The mathematical model was developed to calculate the parameters of sprayed particles and determine their sprayability. It has been shown theoretically that the spraying parameters in the process of cold gas dynamic spraying can be calculated factoring into the regulated parameters of particle speed or energy. Practical Relevance. Based on the developed mathematical models, the authors calculated the parameters of cold gas dynamic spraying, which have effect on the properties of the resulting coatings for particles ranging in size from 5 to 45 micrometers. The paper contains the obtained regularities that determine the possibility to apply powder of a certain fraction, as well as the dependence between speed and temperature of particles and their size. The results obtained can be used to predict the parameters of cold gas dynamic spraying of materials with low melting temperature.
Keywords
cold gas dynamic spraying, mathematical modeling, gas flow, powder material, particle size, powder particle temperature, powder particle speed, spraying efficiency
For citation
Bodrov E.G., Serebriakov I.S., Latfulina Yu.S., Naprimerova E.D., Myasoedov V.A., Samodurova M.N. Mathematical Modeling of the Process of Cold Gas Dynamic Spraying of Powder Non-Ferrous Metals. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2023, vol. 21, no. 4, pp. 148-156. https://doi.org/10.18503/1995-2732-2023-21-4-148-156
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