Abstract
The influence of the concentration and composition of nanomodifiers produced by various methods (thermal synthesis, plasmochemical synthesis, self-propagating high-temperature synthesis, and mechanochemical synthesis) on the microstructure and mechanical properties of synthetic gray iron is investigated, for modification in the mold. In addition, dusty metallurgical waste is considered as a nanomodifier. For comparison, we use classical Russian modifiers. Increase in the Brinell hardness by as much as 13% is seen for cast-iron samples modified by tungsten and titanium carbides (self-propagating high-temperature synthesis + mechanochemical synthesis); 10% increase is seen for samples modified by yttrium oxide with zirconium or chromium (mechanochemical synthesis) and by [ά Fe, TiC x N x , SiC] (plasmochemical synthesis). Increase in tensile strength by about 20% is observed for cast-iron samples modified by tungsten and titanium carbides with zirconium (mechanochemical synthesis). For samples modified by yttrium oxide with zirconium (mechanochemical synthesis) and [ά Fe, TiC x N x , SiC] (plasmochemical synthesis), the strength is increased by 8–12%. The most effective modifier concentrations are about 0.002–0.050%.
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Original Russian Text © V.A. Poluboyarov, Z.A. Korotaeva, A.A. Zhdanok, V.A. Kuznetsov, A.V. Samokhin, 2015, published in “Izvestiya VUZ. Chernaya Metallurgiya,” 2015, No. 10, pp. 728–734.
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Poluboyarov, V.A., Korotaeva, Z.A., Zhdanok, A.A. et al. In-mold modification of iron: Influence of nanomodifiers on gray-iron performance. Part 3. Steel Transl. 45, 723–728 (2015). https://doi.org/10.3103/S0967091215100137
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DOI: https://doi.org/10.3103/S0967091215100137