Automatic Welding, 2023, №01



2023 №01 (07)

DOI of Article 10.37434/as2023.01.01

2023 №01 (02)

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Avtomaticheskaya Svarka (Automatic Welding), #1, 2023, pp. 3-10

Study of the structure of joints of rails of R260MN grade in flash-butt welding

V.I. Shvets, O.V. Didkovsky, I.V. Zyakhor, E.V. Antipin, L.M. Kapitanchuk

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The properties and features of the microstructure of joints of the rail steel of R260MN grade with an elevated content of manganese produced by flash-butt welding with pulsating flashing were investigated. The formation of martensite-austenitic structures due to non-uniform distribution of austenitic stabilizing manganese is shown. The number and sizes of isolated martensite-austenitic structures is insignificant and does not critically affect the test results. The control of the segregation heterogeneity of manganese is achieved by improving the metallurgical process. 11 Ref., 1 Tabl., 10 Fig.
Keywords: flash-butt welding, rails of R260MN grade, hardness distribution, martensite-austenitic structures, segregation heterogeneity


Received: 27.12.2022

References

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3. Shvets, V.I., Didkovsky, O.V., Antipin, Ye.V. et al. (2022) Features of microstructure of butt joints of hypereutectoid Areal-136HE-X rail steel in flash-butt welding. The Paton Welding J., 3, 34-40. https://doi.org/10.37434/as2022.03.03
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7. EN 14587-2007 Flash butt welding of rails. Pt 1 New R220.
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