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Heat treatment of railway rails using HF current heating should be carried out considering the energy consumption for heating equipment service. The increase of efficiency of heat treatment process can be provided by improvement of the inductor design. The peculiarities of distribution of temperature field in the head of rail of R65 type at induction heating with current of 2.4 kHz frequency under the conditions of stationary position of inductor relative to the rail were investigated. The models of inductors with different design of coils of inductive wire of magnetic core were used. It is shown that to achieve primary heating of rolling surface, as compared to side edges of the rail head, and to decrease the capacity of power source is possible by design of the inductor where windings of inductive wire are located across the rolling surface, along the rolling surface and along the lower part of side edges, and magnetic core embraces a part of windings of inductive wire over the rolling surface. The application of additional magnetic cores embracing the part of windings of inductive wire along the side edge of rail head, results in leveling of heating of a fillet, side edges and lower part of side edges. 6 Ref., 1 Table, 4 Figures.

Inductor for continuous heating in hardening of railway rail head