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Structure and Properties of Welded Joints of High-Strength Steels Made by Metal-Cored Wire with Nitrogen

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Metallurgist Aims and scope

An austenitic metal-cored wire (diameter – 1.6 mm) with additional nitrogen alloying (0.25–0.40 wt.%) was developed for this study. Mechanical tests and metallographic studies of the deposited metal and welded joints made with austenitic metal-cored wire (composition – Cr20Mn5Ni4Mo2.5Cu3N0.3) were conducted. It was found that the values of σu and σ0.2 of the deposited metal obtained by using the developed wire were 20 to 30% higher compared to the utilized electrode materials, while the ductility characteristics were preserved (δ = 43%). It was shown that the use of metal-cored wire (Cr20Mn5Ni4Mo2.5Cu3N0.3) for welding of high-strength steel 20HGSNM (EN 1.6523) makes it possible to obtain defect-free welded joints with austenitic-ferritic structure, which have 20% higher strength characteristics compared to the analogues.

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Authors and Affiliations

  1. Ural Federal University named after first President of Russia B. N. Yeltsin, Yekaterinburg, Russia

    A. S. Smolentsev, A. V. Berezovsky, E. A. Usoltsev & A. V. Shak

  2. Institute of Engineering Science, UB RAS, Yekaterinburg, Russia

    V. E. Veselova

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  1. A. S. Smolentsev
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  2. V. E. Veselova
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  3. A. V. Berezovsky
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  4. E. A. Usoltsev
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  5. A. V. Shak
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Correspondence to A. S. Smolentsev.

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Translated from Metallurg, Vol. 67, No. 9, pp. 71–77, September, 2023. Russian https://doi.org/10.52351/00260827_2023_09_71

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Smolentsev, A.S., Veselova, V.E., Berezovsky, A.V. et al. Structure and Properties of Welded Joints of High-Strength Steels Made by Metal-Cored Wire with Nitrogen. Metallurgist 67, 1334–1343 (2024). https://doi.org/10.1007/s11015-024-01625-5

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