| 2022 №10 (02) |
DOI of Article 10.37434/as2022.10.03 |
2022 №10 (04) |
Avtomaticheskaya Svarka (Automatic Welding), #10, 2022, pp. 22-28
Features of resistance preheating at flash-butt welding of thick-walled parts from aluminium alloys
K.V. Hushchyn1, I.V. Zyakhor1, S.M. Samotryasov1, M.S. Zavertannyi1, A.M. Levchuk1, Wang Qichen2
1E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
2CIMC Offshore Engineering Institute Company Limited, Yantai, Shandong, P.R. China
The technological concept of flash-butt welding with resistance preheating using a reusable intermediate insert of a material with a high electrical resistance is proposed and substantiated by calculation. Calculation and experimental results indicate a significant effect of using intermediate insert during resistance heating: the temperature at both characteristic spots grows significantly at all investigated values of current density, insert thickness and heating time. The specified effect is achieved by intensifying and localizing the process of heat generation in the contact area of parts and correspondingly reducing the energy loss for heating the secondary circuit of the welding machine. 13 Ref., 1 Tabl., 8 Fig.
Keywords: flash-butt welding, resistance heating, aluminum alloy, mathematical modeling, temperature field
Received: 22.08.2022
References
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