Abstract

Influence of the in-flight behaviour of the stainless steel 316 powder particles during high velocity oxy-fuel (HVOF) spraying on the properties (porosity and level of oxidation) of the coating is studied. Modelling of the in-flight behaviour is undertaken which takes into account the combustion process, gas dynamics, gas-particle interactions, acceleration and deceleration of the gas flow, heat transfer in the particles and full thermal history of the particles including their melting, cooling and the possible solidification. The results obtained are used for the explanation of the experimental data on the coating porosity and level of oxidation.

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