TPWJ, 2019, #3, 20-26 pages
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #3, 2019 (March)
Weldability of electroslag remelted high-carbon steel at flash-butt welding
A.A. Polishko, L.B. Medovar, A.P. Stovpchenko, E.V. Antipin, A.V. Didkovsky and A.Yu. Tunik
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
The paper presents the results of examination of the structure and properties of samples of rail metal produced by laboratory melting (in slightly deformed and cast state), which were obtained by electroslag remelting after flash-butt welding of rails. Examination showed that the microstructure of weld metal and heat-affected zone in both the cases features a homogeneous dense structure. Fracture of the samples took place mainly in the heat-affected zone. Strength of welded joints from metal in the cast state is lower, than that of slightly deformed one, which is apparently caused by coarse grains, the size of which can be reduced using heat treatment. Electroslag remelted rail steel in the cast and slightly deformed state has a level of mechanical properties in the range of requirements made to nonthermostrengthened rails K76 in GOST R 51045 and DSTU 4344 that reveals the prospects for application of electroslag remelting for manufacture of rails, including rail tongues, applied in as-cast state. 25 Ref., 3 Tables, 7 Figures.
Keywords: flash-butt welding, rail steel, electroslag remelting, slightly deformed and cast metal, welded joint, metallographic studies, mechanical properties
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