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Effect the Thermal Cycle of Welding and Thermal Cycling Treatment on the Properties and Fracture of 08Kh18G8N2T Steel

Abstract

The impact toughness and phase-structural transformations in 08Kh18G8N2T steel are studied after a thermal action, which simulates the heating of the near-weld zone during electroslag welding, and subsequent thermal cycling treatment under various conditions. An increase in the impact toughness from 0.25 to 1.2 MJ/m2 is detected after thermal cycling in the temperature range 700–900°C at a rate of 1°C/s, which is associated with the redistribution of alloying elements between phases, structure fragmentation, and the morphology of excess phases.

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Correspondence to E. V. Sedov.

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Translated by K. Shakhlevich

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Bondareva, O.P., Sedov, E.V. & Kryuchkov, O.B. Effect the Thermal Cycle of Welding and Thermal Cycling Treatment on the Properties and Fracture of 08Kh18G8N2T Steel. Russ. Metall. 2022, 385–390 (2022). https://doi.org/10.1134/S0036029522040073

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  • DOI: https://doi.org/10.1134/S0036029522040073

Keywords:

  • thermal welding cycle
  • thermal cycling treatment
  • near-weld zone
  • impact toughness