| 2021 №04 (06) |
DOI of Article 10.37434/as2021.04.07 |
2021 №04 (01) |
Avtomaticheskaya Svarka (Automatic Welding), #4, 2021, pp. 49-52
Portable module for heat treatment of welded joints of railway rails
E.O. Panteleimonov
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 design features of the portable module for heat treatment of welded joints of railway rails produced by the method of flash butt welding are considered. The process of heat treatment includes an induction heating of welded joints with the currents of 2.4 kHz frequency and a subsequent hardening of the rolling surface of the head by a compressed air. The design of the portable module includes inductors connected directly to matching transformers. The inductor wires repeat the shape of the rail surface bend with increased air gaps above the web and feathers and contain magnetic conductors located above the rolling surface, side surfaces of the head, web and the flange of the rail. It was shown that in welded butts of R65 type rails made of K76F steel after heat treatment on a portable module in the zone of hardening cooling of the head, a uniform fine-grained structure with a hardness is formed, reaching the level of hardness of the base metal. The hardness of the metal in the deep layers of the rail head increases also relative to the hardness of the base metal at the appropriate depth. 10 Ref., 2 Tabl., 5 Fig. Keywords: rails, welded butts, heat treatment, portable module, metal hardness
Received: 03.02.2021
References
1. Golovin, G.F., Zimin, N.V. (1979) Technology of heat treatment of metals using induction heating. Leningrad, Mashinostroenie [in Russian].2. Nesterov, D.K., Sapozhkov, V.E., Levchenko, N.F. et al. (1990) Heat treatment of rail steel using induction heating. Metallovedenie i Termich. Obrab. Metallov, 8, 30-34 [in Russian]. https://doi.org/10.1007/BF00700711
3. Gong, L., Zhu, L., Zhou, H. X. (2017) Effect on hardness and microstructures of rail joint with ultra-narrow gap arc welding by post weld heat treatment. Engineering Materials, 737, 90-94. https://doi.org/10.4028/www.scientific.net/KEM.737.90
4. Ding Wei, Song Hongtu, Li Li, et al (2012) Heat treatment device of welding joint of steel rail. China Pat. CN 201120285569.
5. Feshchukov, A.N., Zeman, S.K., Murkin, M.K. (2016) System for heat treatment of welded joints of railway rails in track conditions. RF Pat. 57752, Int. Cl. Е01В31/18 [in Russian].
6. Panteleimonov, E.O. System for heat treatment of welded joints of railway rails in track conditions. Ukraine Pat. on utility model 114593, Int. Cl. Е01В31/18 [in Ukrainian].
7. Panteleimonov, E.O. Portable module for heat treatment of welded joints of railway rails. Ukraine Pat. on utility model 143908, Int. Cl. Е01В 31/18 (2006.01), С21D 1/10 (2006.01) [in Ukrainian].
8. Panteleimonov, E.O. Induction device for heat treatment of welded joints of railway rails. Ukraine Pat. on utility model 109123, Int. Cl. С21D 1/10 (2006.01) [in Ukrainian].
9. Panteleimonov, E.A., Gubatyuk, R.S. (2016) Induction device for heat treatment of welded joints of railway rails. The Paton Welding J., 10, 41-43. https://doi.org/10.15407/tpwj2016.10.08
10. Kuchuk-Yatsenko, S.I., Antipin, E.V., Didkovskyi, O.V. et al. (2020) Evaluation of quality of welded joints of high-strength railway rails of modern production taking into account the requirements of Ukrainian and European standards. The Paton Welding J., 7, 2-10. https://doi.org/10.37434/as2020.07.01
Advertising in this issue:
