FIELD: thermal treatment of metal products. SUBSTANCE: induction apparatus has windings, which is arranged at welded joint site in opposed relation at both sides of rail. Straight and reversing conductors of windings are separated by magnetic cores movable relative to windings in direction perpendicular to rail side surfaces. Prior to heating, apparatus is fixed in the vicinity of welded joint by means of nuts. EFFECT: increased resistance of welded joint to wear, contact defects and fatigue cracking in transverse direction during operation. 3 cl, 2 dwg
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