Avtomaticheskaya Svarka (Automatic Welding), #3, 2019, pp. 29-37
Weldability of high-carbon steel of electroslag remelting
in flash-butt welding
G.O. Polishko, L.B. Medovar, G.P. Stovpchenko, Ye.V. Antipin, O.V. Didkovskiy and A.Yu. Tunik
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine.
The paper presents the results of a examination of structure and properties of the samples produced by laboratory melt of rail metal (in lightly deformed and cast state) obtained by electroslag remelting after flash-butt welding of rails. The examinations showed that microstructure of weld metal and heat-affected zone in both cases differs by homogeneous dense structure. Fracture of the samples took place mainly in the heat-affected zone. Strength of welded joints from metal in cast state is lower, than lightly deformed one, which is apparently caused by coarse grain, size of which can be refined using heat treatment. Rail steel of electroslag remelting in cast and lightly deformed state has a level of mechanical properties made to non-thermostrengthened rails K76 on GOST R 51045 and DSTU 4344 that reveals the perspectives of application of electroslag remelting for manufacture of rails, including rail tongue, applied in cast steel. 25 Ref., 3 Tabl., 7 Fig.
flash-butt welding, rail steel, electroslag remelting, lightly deformed and cast metal, welded joint, metallographic examinations, mechanical properties
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