METHOD AND DEVICE FOR THERMAL PROCESSING OF WELDED RAIL CONNECTIONS Russian patent published in 2018 - IPC C21D9/04 C21D9/50 C21D1/42 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, in particular the heat treatment of welded rail connections. Method involves initial heating of the entire rail section in the weld region to a heating temperature for quenching by length, exceeding the length of the heat-affected zone of welding and the initial hardening; then the surface layer of at least the rail head is reheated in the zones of thermal influence of the initial heating to the temperature of heating for quenching, wherein the length of the reheat sections is set so as to avoid the overlapping of the zones of thermal re-heating influence on the weld seam, and then perform a refreshing. Method is carried out in an apparatus comprising an initial heating inductor, a quench unit, and two reheat inductors arranged in series along a rail on a movable platform, wherein the heat treatment device and the rail are movable relative to each other.

EFFECT: reduction of rail wear in the area of the weld joint and restoration of structure and properties in welded joints.

10 cl, 8 dwg