Automatic Welding, 2026, №02

2026 №02 (06)

DOI of Article 10.37434/as2026.02.07

2026 №02 (01)

---

"Avtomatychne Zvaryuvannya" (Automatic Welding), #2, 2026, pp. 57-62

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 NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. Е-mail: mail.ruslan@ukr.net

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, thermo-kinetic 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 HAZ metal under various welding thermal cycles. The optimal cooling-rate ranges for the simulated HAZ metal have been established, within which the mechanical property values are maintained at the level of the base metal. 11 Ref., 1 Tabl., 7 Fig.
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: 30.12.2026
Accepted: 10.04.2026
Posted online 11.04.2026

References

1. Mikhoduj, L.I., Kirian, V.I., Poznyakov, V.D., Strizhak, P.A., Snisarenko, V.V. (2003) Sparsely-alloyed high-strength steels for welded structures. The Paton Welding J., 5, 34–37.
2. Grabin, V.F., Golovko, V.V., Kostin, V.A., Alekseenko, I.I. (2004) Morphological peculiarities of microstructure of weld metal from low-alloy steels with ultralow content of carbon. The Paton Welding J., 7, 15–20.
3. Poznyakov, V.D., Barvinko, A.Yu., Barvinko, Yu.P., Sineok, A.G., Yashnik, A.N. (2012) Cold resistance and lamellar fracture resistance of welded joints on steel 06GB-390. The Paton Welding J., 3, 35–39.
4. Nazarov, A., Yakushev, E., Shabalov, I. et al. (2014) Comparison of weldability of high-strength pipe steels microalloyed with niobium, niobium and vanadium. Metallurgist, 57, 911–917. DOI: https://doi.org/10.1007/s11015-014-9821-6
5. Odesskiy, P.D., Molodtsov, A.F., Morozov, Yu. D. (2011) New efficient low-alloy steels for building metal structures. Montazhnye i spetsialnye raboty v stroitelstve, 5, 20–25 [in Russian].
6. Fydrych, D., Tomków, J., Rogalski, G., Łabanowski, J. (2016) Weldability of S460ML high strength low alloy steel in underwater conditions. Applied Mechanics and Materials, 838, 10–17. DOI: https://doi.org/10.4028/www.scientific.net/AMM.838.10
7. Bilyk, A.S., Kurashev, R.V., Gorbatenko, V.V. et al. (2013) Application of thermomechanically strengthened rolled sheet in welded metal structures. Montazhnye i spetsyalnye raboty v stroitelstve, 4, 1–4 [in Russian].
8. Poznyakov, V.D., Zhdanov, S.L., Maksimenko, A.A., Sineok, A.G., Gerasimenko, A.M. (2013) Weldability of sparsely-alloyed steels 06GBD and 06G2B. The Paton Welding J., 4, 8–14.
9. Poznyakov, V.D., Zhdanov S. L., Zavdoveev, A.V. et al. (2016) Weldability of high-strength microalloyed steel S460M. The Paton Welding J., 12, 21–28. DOI: https://doi.org/10.15407/tpwj2016.12.04
10. Grigorenko, G.M., Kostin, V.A., Orlovsky, V.Yu. (2008) Present opportunities of modeling austenite transformations in welds of low-alloy steels. The Paton Welding J., 3, 31–34.
11. Sarzhevsky, V.A., Sazonov, V.Ya. (1981) Installation for simulation of welding thermal cycles based on the MSR-75 machine. Automatic welding, 5, 69–70 [in Russian].

---

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. Avtom. Zvaryuvannya, 02, 57-62.