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2020 №07 (05) DOI of Article
10.37434/tpwj2020.07.01
2020 №07 (02)

The Paton Welding Journal 2020 #07
TPWJ, 2020, #7, 2-10 pages
 
Evaluation of quality of welded joints of high-strength railway rails of modern production taking into account the requirements of ukrainian and european standards

Authors
S.I. Kuchuk-Yatsenko, E.V. Antipin, O.V. Didkovskyi, V.I. Shvets and O.V. Kavunichenko
E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
In most heavy-duty railways of Ukraine, flash-butt welding is the dominant process for joining rails. Welding is performed in special shops and in field conditions during the construction of new main lines and repair of existing railways. Technologies and equipment are constantly being improved in connection with the use in the railways of Ukraine and other countries of the world, of new generations of high-strength rails with an increased wear resistance, in accordance with the requirements to high-speed main lines. In the last decade, the developed countries of the world are revising the basic standards governing the quality of rail steels and requirements to mechanical properties of rail welded joints, taking into account their use on heavy-duty and high-speed main lines. One of the specified tasks is the adaptation of the Ukrainian standard TU U 24.1-40075815-002: 2016 (for stationary and mobile welding machines), which determines the requirements to the quality of welded joints of high-strength rails, to the valid European standard EN 14587-1 2007 (for stationary welding machines) and EN 14587-2 2009 (for mobile welding machines). 9 Ref., 4 Tables, 12 Figures.
Keywords: flash-butt welding, railway rails, high-strength rail steels, pulsed flashing, heat-affected zone, temperature fields, rail defects, quality control, seamless track

Received 24.06.2020

References

1. Kuchuk-Yatsenko, S.I. (1992) Continuous flash-butt welding. Kiev, Naukova Dumka [in Russian].
2. Kuchuk-Yatsenko, S.I., Didkovsky, A.V., Shvets, V.I. (2008) Technology and equipment for flash-butt welding of highstrength rails. The Paton Welding J., 11, 111−120.
3. TU U 27.1-40081293-002:2016: New welded rails for railways: Dnipropetrovske NKTB, NDKTI PJSC Ukrzaliznytsya [in Ukrainian].
4. (2009) Eurostandard EN_14587-1, −2.
5. Kuchuk-Yatsenko, S.I., Didkovsky, O.V., Bogorsky, M.V. et al. (2002) Flash-butt welding method. Pat. 46820, Ukraine, Int. Cl. 6B23K11/04, C2; Pat. 2222415, RF (2003); Pat. 6.294.752, USA (20.06.01); Pat. ZL001016772/5 (2004), PRC.
6. Weingrill, L., Enzinger, N. (2017) Temperature Fields evolution during flash-butt welding of railway rails. Materials Science Forum, 879, 2088-2093. https://doi.org/10.4028/www.scientific.net/MSF.879.2088
7. Kuchuk-Yatsenko, S.I., Milenin, A.S., Velikoivanenko, E.A. et al. (2018) Mathematical modeling in continuous flash-butt welding. The Paton Welding J., 10, 2-8. https://doi.org/10.15407/tpwj2018.10.01
8. Kuchuk-Yatsenko, S.I., Shvets, V.I., Didkovsky, A.V. et al. (2013) Defects of joints of high-strength rails produced using flash-butt welding. Ibid., 9, 2−8.
9. Zabilsky, V.V., Nikonova, R.M. (2005) Ductile-brittle transition in steels at near-solidus temperatures. Mechanism of embrittlement of grain boundaries. Fizika Metallov i Metallovedenie, 99(3), 19 [in Russian].

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