Detection of subsurface defects in places localization "residual patterns" on the surface riding a solid-rolled wheel after restoration its profile on a wheel-turning machine

   The paper described cases related to the formation of "residual patterns" after mechanical turning of the surface of solid-rolled wheels on a wheel-turning machine, the cause is often the wrong mode and conditions for cutting deep gouges and sliders. The problem of leaving "residual patterns" on the rolling surface of the wheel after the turner has set the minimum passage of the cutter in depth in order to increase the turning performance and preserve, among other things, the minimum allowable rim thickness allowed in operation. In practice, there is an identification of subsurface defects in the locations of such sites that are not described in technical regulatory legal acts for the repair and maintenance of wheel sets of wagons. The problems of ultrasonic control of the rolling surface of solid-rolled wheels by a Rayleigh surface wave when detecting subsurface defects in wheel pairs with a thin rim are shown. In order to prevent the omission of defects in the places of "residual patterns", an eddy current method is proposed, which will be used as a confirmation for the presence of hidden surface and subsurface defects.

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