PSI - Issue 36

Sergiy Kozulin et al. / Procedia Structural Integrity 36 (2022) 247–253 Sergiy Kozulin et al. / Structural Integrity Procedia 00 (2021) 000 – 000

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4. Conclusions 1. It is established that the structure recrystallization occurs as the result of the effect of automatic heat treatment of layers of multi-pass weld, facilitating the grains refining at the area of metal HAZ overheating and weld. 2. Mechanical tests of characteristic areas of the welded joints obtained by multi-pass electroslag welding show that there is a significant increase in impact toughness in these areas. 3. Thus, in order to achieve equal-strength welded joints in the process of restoring destroyed parts on the site using multi-pass electroslag welding, it is possible to carry out local high annealing for residual stresses relieve, which is very important while performing these works under assembly conditions. References DSTU 8781, 2018. Steel castings. General technical conditions.AU "UkrNDNC", Kyiv. Dzioba, I., Pała , T., 2020. Influence of the Energy of Welding on the Strength of Joints of S960QC High - Strength Steel. Mater Sci 55, 597–601. https://doi.org/10.1007/s11003 - 020 - 00344 - x Filchenkov, D, Kozulin, M., Sushchuk - Slyusarenko, I., 1982. Repair of defects of cast products from 30GSL steel by multilayer electroslag welding. Svarochnoe Proizvodstvo 9, 19 - 20. Moltasov, А. , 2019. Stressed State of a Butt - Welded Joint with Regard for Displacements of the Centers of Inertia. Mater Sci 55, 358–366. https://doi.org/10.1007/s11003 - 019 - 00310 - 2 Knysh, V., Solovei, S., Nyrkova, L., Osadchuk, S., 2020. Influence of Marine Media on the Fatigue Strength of Butt Welded Joints of 15KhSND Steel Hardened by High - Frequency Mechanical Impacts. Mater Sci 55, 812–821 (2020). https://doi.org/10.1007/s11003 - 020 - 00374 - 5 Kostin, V., Grigorenko, G., Poznyakov, V., Zuber, T., 2020. Structural Transformations of the Metal of Heat - Affected Zone of Welded Joints of High - Strength Armor Steels. Mater Sci 55, 863–869. https://doi.org/10.1007/s11003 - 020 - 00380 - 7 Kozulin, S., Lychko, I., Podyma, G., 2013. Structure and properties of steel 35L welded joints produced using multilayer electroslag welding. The Paton Welding Journal 8, 7 - 12. Paton, B.,1980. Electroslag welding and surfacing. Moscow: Mashinostroenie. Paton, B., Yushchenko, K., Kozulin, S., Lychko, I., 2019. Electroslag welding process. Analysis of the state and tendencies of development

(Review). The Paton Welding Journal 10, 33–40. https://doi.org/10.15407/tpwj2019.10.05 Sushchuk - Slyusarenko, I., 1977. Electroslag welding and cladding. Moscow: VINITI, 9.

Sushchuk - Slyusarenko, I., Lychko, I., Kozulin, M., 1989. Electroslag welding and surfacing in repair works. Kyiv: Naukova Dumka. Yushchenko, K., Kozulin, S., Lychko, I., Kozulin, M., 2014. Joining of thick metal by multi - pass electroslag welding. The Paton Welding Journal 9, 30 - 33. https://doi.org/10.15407/tpwj2014.09.04.