Abstract
The structure and phase state and internal stress fields of plasma powder Ni–Cr–B–Si–Fe/WC surface coatings are compared in the presence and absence of a modifier: Al2O3 nanoparticles. PS-12NVK-01 powder alloy applied to a steel 20 substrate is studied by transmission diffraction electron microscopy of thin films, scanning electron microscopy, and X-ray structural and local X-ray spectral analysis. The phase composition of the alloy is determined; its defect structure and internal stress are studied. The structure of the material is analyzed before and after the introduction of Al2O3 nanopowder in the melt. Introducing the modifier reduces the grain size of the material; leads to the formation of tungsten carbide W2C and the boride Fe3Ni3B in the carbide subsystem; and reduces the internal stress and scalar dislocation density.
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Original Russian Text © A.N. Smirnov, E.V. Kozlov, M.V. Radchenko, K.V. Knyaz’kov, V.L. Knyaz’kov, 2016, published in Izvestiya VUZ. Chernaya Metallurgiya, 2016, No. 4, pp. 245–250.
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Smirnov, A.N., Kozlov, E.V., Radchenko, M.V. et al. State of Ni–Cr–B–Si–Fe/WC coatings after plasma powder surfacing with nanopowder modifier. Steel Transl. 46, 251–255 (2016). https://doi.org/10.3103/S0967091216040148
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DOI: https://doi.org/10.3103/S0967091216040148