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Tensile Deformation Behavior of Steel 20Kh3 After Quenching and Tempering

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).

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Key words

  • quenching and tempering
  • chromium carbides
  • tensile tests
  • deformation stages
  • radial fracture zone