The Paton Welding Journal, 2020, #9, 36-39 pages
Double heat treatment of welded butt joints of railway rails
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
The paper presents the results of heat treatment of butt welded joints of R65 rails from K76F steel, produced by flashbutt
welding. It is shown that after pre-annealing of butt welded joints with further accelerated heating up to the temperature
of heat treatment and quenching of the rail rolling surface by compressed air, the microstructure of butt welded
joint metal changes, grain size is considerably refined, hardness along the HAZ width is increased, and deviation of
metal hardness along the joint line from base metal level becomes smaller. 12 Ref., 1 Table, 5 Figures.
rails, welded butt joints, heat treatment, microstructure, hardness
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