FIELD: electricity.
SUBSTANCE: heat treatment apparatus for rail stress relief, which is welded, comprises an induction heating coil, which is placed on the side surface of the rail web at a distance from the weld center rail 20 to 300 mm in the longitudinal direction of the rail. The apparatus may comprise multiple induction heating coils, which can be placed on either side of the center of the weld. The apparatus may include multiple induction heating coils. The axial direction of each coil is perpendicular relative to the side rail surface and the coil are placed at an equal distance from the center of the weld along the longitudinal direction of the rail cross-sectional perimeter of the rail and are separated from each other.
EFFECT: increase in durability of the rail.
19 cl, 11 dwg
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