Heat treatment of rail steel using induction heating

Inductor for continuous heating in hardening of railway rail head

“…The surface heat treatment (HT) of railway rail head with application of induction heating using HF currents is directed to improvement of physical and mechanical properties of rails and decrease of their stressed state. The concentration of energy in surface layer of metal, characteristic of HF current heating, provides high rates of heating across the thickness of head surface, allows controlling the level of dispersity of structure and size of austenite grain [1,2]. At the same time HT with HF current heating is a sufficiently complex and power consuming process.…”

Induction device for heat treatment of welded joints of railway rails

“…Heat treatment of the welded joints of railway rails, produced with resistance butt welding, is used for providing structural zonal homogeneity after welding, balance of hardness of metal of rails head, elimination of unfavorable diagram of internal residual stresses of welded joint metal [1,2]. A process of heat treatment includes heating of welded joint zone and further quenching of running surface of rail head by means of forced cooling with air-water mixture or compressed air.…”