Abstract
The article is devoted to the analysis of the quality of the metal deposited on the entire worn surface of the wagon wheel. The values of the specific energy of the multi-electrode surfacing process, determined by voltage and current, providing the necessary heat supply to the base metal to heat it up to 200 °C, have been experimentally identified. The technological sequence of surfacing wide-layer beads on the rolling surface and the wheel flange is presented. The adopted scheme of bead overlayingcreates favorable conditions for the course of thermal deformation cycles of surfacing. The quality of the bead formation is affected by the location of the electrodes relative to the surfacing surface. Depending on the required thickness and width of the bead applied to the cylindrical surface of the wheel, the diameter and number of electrodes, as well as the value of their displacement from the zenith, were selected. The reasons for the formation of defects and methods of their elimination are revealed. It has been determined that on optimal regimes without pre-heating the wagon wheel, it is possible to obtain metal without defects and brittle structures on the restored surface.
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