The interrelation between the fine structure and the cold resistance of forgings and rolled sheets from ferritic-pearlitic steel 09G2SA-A after heat hardening and additional tempering at 450°C is studied. The additional medium-temperature tempering is shown to raise effectively the cold resistance of the steel due to coagulation and spheroidization of the cementite-type carbides, which make the structure of the steel more equilibrium.
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The experimental studies have been performed with the help of the equipment of the Collective Use Center “Composition, Structure and Properties of Structural and Functional Materials,” of the Central Research Institute of Structural Materials “Prometey” of the National Research Center “Kurchatov Institute” with financial support of the Ministry of Science of the Russian Federation within Agreement No. 14.595.21.0004, Unique Identifier RFMEF159517X0004.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 36 – 42, November, 2018.
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Gorynin, V.I., Kondrat’ev, S.Y., Olenin, M.I. et al. Effect of Medium-Temperature Additional Tempering on the Carbide Phase and Cold Resistance of Heat-Hardenable Steel 09G2SA-A. Met Sci Heat Treat 60, 722–727 (2019). https://doi.org/10.1007/s11041-019-00346-w
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DOI: https://doi.org/10.1007/s11041-019-00346-w