Understanding the relationship between the thermophysical and physico-mechanical parameters of plasma spraying and the travel rate of the plasmatron
In cost-effectiveness terms, rebuilding parts (in particular, by gas-thermal spraying) is justified by the fact that almost half of the parts submitted for repair can be rebuilt and reused, and the rebuild cost amounts to 15…30% of the cost of new parts. It should be noted that only 5…9% of parts cannot be rebuilt. One of the innovative rebuild techniques includes plasma spraying. This paper offers some equations for defining the kinematic modes of plasma spraying, and namely for defining the travel rate of the plasmatron when handling parts with complex surface geometry. The authors came up with a system of equations for predicting the propagation of heat in parts during plasma spraying. A system of equations was also developed for predicting the resultant thickness of a plasma sprayed surface layer.