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2022 №03 (03) DOI of Article
10.37434/tpwj2022.03.04
2022 №03 (05)

The Paton Welding Journal 2022 #03
The Paton Welding Journal, 2022, #3, 34-40 pages

Features of microstructure of joints of hypereutectoid AREAl-136HE-X rail steel in flash-butt welding

V.I. Shvets1, O.V. Didkovskyi1, Ye.V. Antipin1, I.V. Zyakhor1, L.M. Kapitanchuk1, Wang Qichen2


1E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: zyakhor@paton.kiev.ua
2CiMC offshore Engineering institute Company limited yantai 70 Zhifudao E Rd, Zhifu District, yantai, Shandong, 264012, p.R. China

Abstract
The microstructure and properties of butt joints of rails from hypereutectoid Areal 136HE-X steel produced by the flash- butt welding technology were investigated. it was found that under thermal and deformation conditions of welding, carbon redistribution is accompanied by the formation of particles in the microstructure with carbon precipitation and a decrease in carbon content in the matrix. A number of particles grows in the direction of the butt and their highest concentration is observed in the near-contact layer. According to the distribution of hardness in the zone of a coarse grain, in contrast to the butt joints of hypoeutectoid rails, as compared to the base metal, the hardness is slightly reduced — HV 3900 Mpa and HV 4000 Mpa, respectively. This is caused by the absence of free carbides in the microstructure. The features of microstructure do not significantly affect the results of tests on static bending and meet the requirements of domestic and European standards.
Keywords: flash-butt welding, hypereutectoid rail steels, carbon redistribution, hardness distribution, static bending

Received: 27.01.2022
Accepted: 16.05.2022

References

1. Kuchuk-Yatsenko, S.I. (1992) Flash-butt welding. Kiev, Naukova Dumka [in Russian].
2. Fujll Mitsuru, Nakanowatari Hiroaki, Narial Kiyoshi (2015) Rail Flash-Butt Welding. Jfe Technical Report No. 20, March. https:WWW jfe-steel.co.jp
3. S. Kendji, F. Hiroshi, T. Yasunobu (2014) Method of flashbutt welding of rail steel. Nippon Steel and Sumitomo Metal Corp. No. 216.012 А172/20.02.2014. https://edrid.ru/en/ rid/216/012/a172.html https://doi.org/10.1088/1475-7516/2014/02/012
4. Kuchuk-Yatsenko, S.I. (2018) Technologies and equipment for flash-butt welding of rails: 60 years of continuous innovations. The Paton Welding J., 11-12, 29-44. https://doi.org/10.15407/tpwj2018.12.03
5. Kuchuk-Yatsenko, S.I., Didkovsky, O.V., Bogorsky, M.V. et al. (2002) Flash-butt welding. Ukraine Pat. 46820 6В23К11/04, С2, Russia Pat. 2222415 of 2003, US Pat.
6.294.752 of 2001, Great-Britain Pat. GB235725.9A of 20.06.01, China Pat. ZL00101672/5, of 2004. 6. Gulyaev, A.P. (1977) Metals science: Manual for Higher Education Inst., Moscow, Metallurgiya [in Russian].
7. Gavrylyuk, V.G. (1987) Distribution of carbon in steel. Kyiv, Naukova Dumka [in Ukrainian].
8. Aksenova, K.V., Gromov, V.E., Ivanov, Yu.F. et al. (2017) Сarbon redistribution under deformation of steels with bainite and martensite structures. Izv. Vuzov, Chyorn. Metallurgiya, 60(7), 544-548 [in Russian]. https://doi.org/10.17073/0368-0797-2017-7-544-548
9. Yuriev, A.A., Ivanov, Yu.F., Gromov, V.F. et al. (2017) Redistribution of carbon in structure of rail steel after long operation. Vestnik SibGIU, 4, 22, UDK 669.539.382.17 [in Russian] https://cyberleninka.ru/article/n/pereraspredelenie- ugleroda-v-strukture-relsovoy-stali-po
10. Belous M.V., Novozhilov, V.B., Shatalova, L.A., Shejko, Yu.P.(1995) Distribution of carbon by state in tempered steel, 79(4), 128-137 [in Russian].
11. Zakirpichnaya, M.M., Kuzeev, I.R., Tkachenko, O.I. (1999) Distribution of fullerenes by zones of welded joint. Svarochn. Proizvodstvo, 11 [in Russian]. http://library.nuft.edu.ua/ebook/file
12. ТU U 27.1-40081293-002:2016. New welded rails for railways. Dnipro, NDKTI Ukrzaliznytsia [in Ukrainian].
13. DIN EN 14587-2:2009 (E). Railway applications - Track - Flash butt welding of rails - Pt 2: New R220, R260, R260Mn and R350HT grade rails by mobile welding machines at sites other than a fixed plant URL://https://www.en-standard.eu/dinen14587- 2-railway-applications-track-flash-butt-welding-ofrails- part-2-new-r220-r260-r260mn-and-r350ht-grade-railsbymobile- welding-machines-at-sites-other-than-a-fixed-plant

Suggested Citation

V.I. Shvets, O.V. Didkovskyi, Ye.V. Antipin, I.V. Zyakhor, L.M. Kapitanchuk, Wang Qichen (2022) Features of microstructure of joints of hypereutectoid AREAl-136HE-X rail steel in flash-butt welding. The Paton Welding J., 03, 34-40.