The Paton Welding Journal, 2020, №09



2020 №09 (05)

DOI of Article 10.37434/tpwj2020.09.06

2020 №09 (07)

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The Paton Welding Journal, 2020, #9, 36-39 pages

Double heat treatment of welded butt joints of railway rails

Ye.O. Panteleimonov

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
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. Keywords: rails, welded butt joints, heat treatment, microstructure, hardness

Received 26.05.2020

References

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