Abstract
The prospects of application for the method of non-destructive testing by continuous indentation of an indenter for determination of the mechanical properties for thermal sprayed coatings are considered. Research to assess the microhardness of composite coatings based on the tungsten and chromium carbides obtained by the D – gun spraying have been carried out. The penetration diagrams of coatings made of powders WC – 8% Co (VK8), WC – 15% Co (VK15), WC – 18% Co (VK18S), 3%Cr – 2%C – 15% Ni (KHN15S) are considered. It is shown that under optimal spraying conditions, the microhardness of obtaining coatings is close to the microhardness of sintered hard alloys of the same composition. The values of variation coefficients of microhardness values with an increase of the indentation depth for specimens from sintered hard alloy and sprayed coatings were determined. Under optimal spraying conditions the maximum values of microhardness and more homogeneous structure and mechanical properties of coatings are achieved.
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Romanchenko, O., Lohunov, O., Kharlamov, Y., Sokolov, V., Krol, O. (2022). Microindentation Hardness Testing of D – gun Sprayed Coatings. In: Cioboată, D.D. (eds) International Conference on Reliable Systems Engineering (ICoRSE) - 2021. ICoRSE 2021. Lecture Notes in Networks and Systems, vol 305. Springer, Cham. https://doi.org/10.1007/978-3-030-83368-8_9
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