Conclusions
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1.
A mixture whose alloy component is of 180- to 315-μ particle size possesses optimum alloying properties. Use of such a mixture enables the mechanical characteristics of parts from sintered materials to be improved by 15–20%.
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2.
The addition of 1.5–2.0% of carbon to a starting material reduces the diffusional mobility of impregnating elements in the surface layers of parts, as a result of which coherent, nonporous layers are formed composed of Me23C6 and Me7C3 carbides.
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3.
Diffusion alloying with a group of elements substantially increases the strength and oxidation and corrosion resistance of sintered materials.
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Literature cited
V. I. Arkharov, “Development trends in the production of metals with coatings,” in: Protective Coatings on Metals [in Russian], No. 9, Kiev (1975), pp. 28–39.
V. I. Tkachev et al., “Increasing the wear resistance and life of thin-blade cutting components by thermal diffusion alloying,” in: Ways of Increasing the Life of Parts of Agricultural Machines [in Russian], Rostov-on-Don (1968), pp. 142–151.
V. K. Nekrasov et al., “Effect of fraction of chromium powder on the rate of diffusion chromizing in powders,” in: Intensification of Chemicothermal Treatment Processes [in Russian], Moscow (1973), pp. 125–139.
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Translated from Poroshkovaya Metallurgiya, No. 9(177), pp. 57–61, September, 1977.
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Fishtein, B.M., Kem, A.Y. Complex diffusion alloying of sintered materials. Powder Metall Met Ceram 16, 700–703 (1977). https://doi.org/10.1007/BF00791471
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DOI: https://doi.org/10.1007/BF00791471