The structure of a copper–zinc coating deposited onto steel 40Kh at 450°C by the method of gas-dynamic spraying of a mechanical mixture of copper, zinc and corundum particles with 2-mm displacement of the sprayer nozzle is studied. The coated specimens are heat treated in a furnace at 420 – 430°C for at most 180 min. The structure and the chemical composition of the coating are studied by the methods of x-ray diffraction phase analysis and microscopic spectrum analysis. It is shown that the spraying is accompanied by diffusion of copper into zinc, which yields an electron-type solid solution based on Cu5Zn8 (a γ-phase). After the heat treatment at 420 – 430°C for 180 min the coating contains a solid solution of zinc in copper (an α-phase) and an electron-type solid solution based on CuZn (a γ′-phase). The chemical and phase compositions of the coating correspond to duplex brass L65.
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Here and below in the article the contents of the elements and of the phases is given in mass percent.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 3 – 7, July, 2023.
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Arkhipov, V.E., Murav’eva, T.I., Moskvitin, G.V. et al. Effect of Heat Treatment on the Phase Composition of Copper-Zinc Coating on Steels. Met Sci Heat Treat 65, 395–399 (2023). https://doi.org/10.1007/s11041-023-00945-8
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DOI: https://doi.org/10.1007/s11041-023-00945-8