The Paton Welding Journal, 2026, №05

2026 №05 (02)

DOI of Article 10.37434/tpwj2026.05.03

2026 №05 (04)

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The Paton Welding Journal, 2026, #5, 18-23 pages

Influence of thermal cycles of arc welding on the structure and properties of welded joints of low-alloy steels with a yield strength of 390‒490 MPa

R.V. Bohodist, S.L. Zhdanov

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: mail.ruslan@ukr.net

Abstract
The paper examines the regularities of phase-structural transformations in simulated heat-affected zone (HAZ) metal of welded joints of 06GBD and S460M steels with a yield strength of 390‒490 MPa. Using the Gleeble-3800 thermal-mechanical simulator, thermokinetic diagrams of austenite transformation in the simulated HAZ metal were constructed. Metallographic studies made it possible to assess the influence of structural changes on the mechanical properties of the HA Z metal under various welding thermal cycles. The optimal cooling rate ranges for the simulated HA Z metal have been established, within which the mechanical property values are maintained at the level of the base metal.
Keywords: low-alloy steel, arc welding, welding thermal cycle, mechanical properties, structure, cooling rate, heat-affected zone

Received: 12.11.2025
Received in revised form: 30.12.2025
Accepted: 19.05.2026

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Suggested Citation

R.V. Bohodist, S.L. Zhdanov (2026) Influence of thermal cycles of arc welding on the structure and properties of welded joints of low-alloy steels with a yield strength of 390‒490 MPa. The Paton Welding J., 05, 18-23. https://doi.org/10.37434/tpwj2026.05.03

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