Automatic Welding, 2023, №05



2023 №05 (07)

DOI of Article 10.37434/as2023.05.01

2023 №05 (02)

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Avtomaticheskaya Svarka (Automatic Welding), #5, 2023, pp. 5-17

Modern technologies of welding railway rails (Review)

I.V. Ziakhor¹, E.V. Antipin¹, O.V. Didkovsky¹, O.V. Kavunichenko¹, A.M. Levchuk¹, Yu.A. Shilo¹, Yan Truska²

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²SaZ s.r.o. Company. Koupelní 3908/6, 69501 Hodonín, Czech Republic

The known methods of welding railway rails in terms of their efficiency, productivity and ability to provide the quality of welded rails in accordance with the requirements of acting standards were analyzed. When evaluating the efficiency of different methods of welding, the technological features of the formation of welded joints, indicators of mechanical properties, macro- and microstructure of joints, the probability of defects formation, efficiency and possibility of automation of the welding process were taken into account. It is shown that such welding methods received practical application as termitic, automatic electric arc, gas-pressure and electric resistance. The varieties of the latter are flash-butt welding (FBW) using continuous flashing, FBW with resistance preheating and FBW with pulsating flashing. FBW technology with pulsating flashing allows providing optimal thermal cycles when welding steels with different chemical composition and properties and provides the quality of joints regulated by acting standards. Scientific, technological and design developments of PWI were implemented in a series of stationary and mobile rail welding machines, which are completed with mobile rail welding complexes, successfully implemented in many countries of the world. 53 Ref., 3 Tabl., 14 Fig.
Keywords: termitic, electric arc, gas-press, flash-butt welding of rails


Received: 10.04.2023

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