The structure and tensile mechanical properties of sparingly alloyed steel 20Kh3 are studied after quenching and tempering at different temperatures. Comparative analysis of the load-extension curves in individual deformation stages and of the fracture zones after tempering at 250 – 650°C is performed. It is shown that the low ductility margin of steel 20Kh3 after high-temperature tempering is a result of precipitation of special carbides controlling the density and mobility of dislocations both inside grains (Cr7C3) and over grain boundaries (Cr7C3, Cr23C6 ).
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 15 – 20, August, 2022.
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Selivanova, O.V., Khotinov, V.A., Ovsyannikov, A.B. et al. Tensile Deformation Behavior of Steel 20Kh3 After Quenching and Tempering. Met Sci Heat Treat 64, 436–440 (2022). https://doi.org/10.1007/s11041-022-00826-6
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DOI: https://doi.org/10.1007/s11041-022-00826-6