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2020 №09 (05) DOI of Article
10.37434/as2020.09.06
2020 №09 (07)

Automatic Welding 2020 #09
Avtomaticheskaya Svarka (Automatic Welding), #9, 2020, pp. 47-50

Double heat treatment of welded joints of railway rails

E.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

The paper presents the results of heat treatment of welded joints of R65 rails from K76F steel, produced by flash-butt 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 welded butt joint metal changes, grain size is considerably refined, hardness across the HAZ width is increased, and deviation of metal hardness along the joint line from base metal level becomes smaller. 12 Ref., 1 Tabl., 5 Fig.
Keywords: rails, welded butt joints, heat treatment, microstructure, hardness

Received: 26.05.2020

References

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