THEORETICAL ASPECTS OF CENTRIFUGAL INDUCTION DEPOSITION OF FUNCTIONAL COATINGS

The theoretical aspects of calculating temperature–time parameters for single-layer, multilayer, and thick-layer functional coatings obtained by the method of centrifugal induction surfacing with account for geometric, ther- mophysical, and electrophysical parameters of the workpiece and the layer being applied, and also convective and radiative heating of the outer workpiece surface. A system has been developed for control of the workpiece temperature in the process of centrifugal induction surfacing, and also a mathematical model has been developed for the movement of the melt front in the coating material, differing from the existing models in that the surface tem- perature from which the heat transfer occurs is variable and changes in time according to a linear law. Using this model, we determined the minimum time of coating deposition onto the workpiece making it possible to minimize the negative effect of the thermal impact on the formation of its structure, to raise the technological process pro- ductivity, to reduce energy consumption, and to save nonferrous and high alloys due to a reduction in the allowance for mechanical treatment of the workpiece

Author:  M. A. Belotserkovsky, I. A. Sosnovsky, A. A. Kurilyonok, and V. V. Shkurko
Keywords:  centrifugal induction surfacing, functional coating, mathematical model, heat transfer, melt front, temperature control system
Page:  694