Abstract
Mechanical properties of chromium-nickel-molybdenum steels with the carbon contents of 0.1 to 0.4% after slow continuous cooling in the bainitic range have been determined, and the structure has been investigated. It has been shown that, at a carbon content of about 0.10–0.15% and upon additional alloying with silicon and aluminum after such a heat treatment, in steels, the structure of carbide-free bainite is formed and a substantial enhancement in the impact toughness is observed compared to bainite containing carbide precipitates. The enhancement in the level of toughness is related to the presence in carbide-free bainite of an appreciable amount of retained austenite enriched with carbon.
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Original Russian Text © A.Yu. Kaletin, A.G. Ryzhkov, Yu.V. Kaletina, 2015, published in Fizika Metallov i Metallovedenie, 2015, Vol. 116, No. 1, pp. 114–120.
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Kaletin, A.Y., Ryzhkov, A.G. & Kaletina, Y.V. Enhancement of impact toughness of structural steels upon formation of carbide-free bainite. Phys. Metals Metallogr. 116, 109–114 (2015). https://doi.org/10.1134/S0031918X15010068
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DOI: https://doi.org/10.1134/S0031918X15010068