OBRABOTKAMETALLOV Vol. 25 No. 4 2023 technology Review of modern requirements for welding of pipe high-strength low-alloy steels Yulia Karlina 1, a, *, Roman Kononenko 2, b, Vladimir Ivancivsky 3, c, Maksim Popov 2, d, Fedor Deriugin 2, e, Vladislav Byankin 2, f 1 National Research Moscow State University of Civil Engineering, 26 Yaroslavskoe Shosse, Moscow, 129337, Russian Federation 2 Irkutsk National Research Technical University, 83 Lermontova str., Irkutsk, 664074, Russian Federation 3 Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation a https://orcid.org/0000-0001-6519-561X, jul.karlina@gmail.com; b https://orcid.org/0009-0001-5900-065X, istu_politeh@mail.ru; c https://orcid.org/0000-0001-9244-225X, ivancivskij@corp.nstu.ru; d https://orcid.org/0000-0003-2387-9620, popovma.kvantum@gmail.com; e https://orcid.org/0009-0004-4677-3970, deryugin040301@yandex.ru; f https://orcid.org/0009-0007-0488-2724, borck3420@gmail.com Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2023 vol. 25 no. 4 pp. 36–60 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2023-25.4-36-60 ART I CLE I NFO Article history: Received: 13 September 2023 Revised: 21 September 2023 Accepted: 27 September 2023 Available online: 15 December 2023 Keywords: Steel Ferrite Perlite Beinite Martensite Impact toughness Fracture Hybrid laser welding Standards Acknowledgements Research was partially conducted at core facility “Structure, mechanical and physical properties of materials”. ABSTRACT For many years, proven arc welding processes have been used to weld large pipes of oil and gas pipelines, the scope of which extends from manual arc welding with stick electrodes to the use of metal orbital welding machines. Introduction reflects that the creation of new steel compositions for oil and gas pipelines is an urgent task to ensure its high reliability. Research Methods. Low-carbon steels with ferrite-perlite structure are usually used in pipe production, but these steels are unable to meet the increased market demands. New grades of steel with bainitic structure are appearing. Results. The failure of welded joints of pipelines made of high-quality steel is becoming a serious problem for the pipeline industry. Discussion. This paper analyzes the characteristics of weld microstructure and its relationship with impact toughness. The prediction of impact toughness based on the microstructural characteristics of weld-seam metals is complicated due to a large number of parameters involved. The common practice linking this property to the microstructure of the last roll of a multi-pass weld turned out to be unsatisfactory because the amount of needle ferrite, the most desirable component, may not always be the main factor affecting the impact toughness. The present review reports on the most representative study regarding the microstructural factor in the welded seam of pipe steels. It includes a summary of the most important process variables, material properties, normative rule, as well as microstructure characteristics and mechanical properties of the joints. Conclusion. It is intended that this review will help readers with different backgrounds, from non-specialist welders or material scientists to specialists in various industrial applications and researchers. For citation: Karlina Yu.I., Kononenko R.V., Ivancivsky V.V., Popov M.A., Derjugin F.F., Byankin V.E. Review of modern requirements for welding of pipe high-strength low-alloy steels. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2023, vol. 25, no. 4, pp. 36–60. DOI: 10.17212/1994-6309-2023-25.4-36-60. (In Russian). ______ * Corresponding author Karlina Yulia I., Ph.D. (Engineering), Research Associate National Research Moscow State Construction University, Yaroslavskoe shosse, 26, 129337, Moscow, Russian Federation Tel.: +7 (914) 879-85-05, e-mail: jul.karlina@gmail.com Introduction Due to the growing demand for oil and gas, pipelines made of high-quality steel are widely used in the pipeline industry. The material from which these pipes are made meets strict design requirements to withstand severe operating and environmental conditions [1, 2].
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