Abstract
The structure and properties of high-speed gas-flame (HSGF) coating of the system TiC0.14N0.86−Ni(CrBSi)-alloy (70%) on high-strength cast iron have been studied. The HSGF coatings were deposited on the Struya installation at the Institute for Problems of Materials Science, operating on an oxygen-hydrogen fuel mixture in a nearly stoichiometric ratio. The pressure in the combustion chamber was 0.6 MPa, the gas consumption was 8.5 g/sec, the sprayed powder consumption was 2.2 g/sec, the transporting air consumption was 0.5 g/sec, and the spraying distance was 200 mm. The coating was about 1 mm thick with a porosity of less than 2% and had a typical layered structure. The alternating zones were enriched with a refractory phase or metal. In comparison with the alloy WC (8% Co) the coating had lower linear wear (<5 μm/km) and a lower friction coefficient (0.1), and its resistance to high-temperature corrosion was almost an order of magnitude higher.
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Institute for Problems of Materials Science, Ukraine National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 7–8(408), pp. 40–44, July–August, 1999.
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Podchernyaeva, I.A., Kisel’, V.M., Evdokimenko, Y.I. et al. Investigation of a wear-and corrosion-resistant coating of the TiCN−Ni-alloy system, obtained by high-speed gas-flame spraying. Powder Metall Met Ceram 38, 358–361 (1999). https://doi.org/10.1007/BF02676169
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DOI: https://doi.org/10.1007/BF02676169