Automatic Welding, 2018, №03



2018 №03 (07)

DOI of Article 10.15407/as2018.03.08

2018 №03 (09)

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Avtomaticheskaya Svarka (Automatic Welding), № 3, 2018, pp. 43-47

To the issue of heat treatment of welded butts of rails

E. A. Panteleymonov

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
 
 
The features of design of inductors with magnetic conductors are given, applied in a portable module for heat treatment of welded butts of rails produced by flash-butt welding. It is shown that the shape of the inducing wire of inductors, the location of magnetic conductors relative to the rail and the technology of induction heating by currents of 2.4 kHz frequency provide a uniform distribution of the temperature field in welded butt, low temperature difference between the surface and deep layers of the rail, and also a decrease in the heating time. As a result of heat treatment of welded butts of rails R65 of steel K76F and rails of UIC 60 of steel 900A on a portable module of the E.O. Paton Electric Welding Institute, the microstructure of metal of welded butts changes significantly, the hardness HRC is uniformly distributed over the width of HAZ, the deviation of hardness HRC from the level of base metal decreases. 7 Ref., 2 Tabl., 6 Fig.
 
Keywords: rails, welded butts, heat treatment, inductors, microstructure, hardness
References

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2. Nesterov, D.K., Sapozhkov, V.E., Levchenko N.F. et al. (1990) Heat treatment of rail steel using induction heating. Metallovedenie i Term. Obrabotka Metallov, 8, 30-34 [in Russian].
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6. Panteleymonov, S.O. Complex for heat treatment of rail welded joints in track conditions. Pat. 114593 Ukraine, Int. Cl. E01B31/18; 10.03.2017 [in Ukrainian].
7. Panteleymonov, E.A., Gubatyuk, R.S. (2016) Induction device for heat treatment of welded joints of railway rails. The Paton Welding J., 9, 41-43. https://doi.org/10.15407/tpwj2016.10.08