Automatic Welding, 2023, №07



2023 №07 (01)

DOI of Article 10.37434/as2023.07.02

2023 №07 (03)

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Avtomaticheskaya Svarka (Automatic Welding), #7, 2023, pp. 16-24

Features of formation and transformation of oxides in flash-butt welding of K76F rails

V.I. Shvets, I.V. Zyakhor, 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 transformation of oxide inclusions in flash-butt welding (FBW) of К76F rails was studied with the use of the Augermicroprobe JAMP 9500F of «JEOL» company (Japan) with the X-ray energy dispersion spectrometer INCA Penta FET x3 mounted on it and involvement of the most informative methodologies of fractographic analysis. It is shown that hightemperature oxide inclusions without changing the aggregate state are removed as a flash. On the basis of silicon oxides on a molten surface in the welding process, easy fusible iron manganese and in the near-contact layer - manganese silicates are formed. The heterogeneity of silicon distribution is the cause of formation of clusters of silicates and formation of “matt spots” in the near-contact layer. 10 Ref., 7 Fig.
Keywords: flash-butt welding, КF76 rails, silicates, «matt spots»


Received: 22.05.2023

References

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