Features of restoring the rolling profile of wheels coming into turning during repair

Emperor Alexander I St. Petersburg State Transport University, Department of Metal Technology, St. Petersburg, Russia

^* Corresponding author: tehmet_pgups@mail.ru

Abstract

The main objective of the performed studies was to improve the durability and operability of railroad wheels and make lower the costs of acquiring new ones by means of an innovative technology development for wheel profile rehabilitation and further restoration of physical and mechanical properties of the rim metal and improvement its structure. The information consists the facts about the nature of wheel pairs damage in operation, machine-tool equipment and cutting tools, used to restore the surface, based on the analysis of which a new rational technology for repair of wheel pairs on the rolling surface profile with subsequent restoration of the original operational properties is collected. A new method of wheel rolling surface profile restoration has been developed, which includes highperformance plunge grinding and subsequent induction heating (thermocycling), resulting in the formation of structures that lead to increasing of hardness and formation of compressive stresses, which has a positive effect on the efficiency of wheel rolling surface operation. This increases wheel life and safe operation of rail rolling stock. The implementation of the wheel profile recovery method with the help of highperformance plunge grinding and induction heating of wheels will lead to increased efficiency of railway rolling stock and reduce the need for the purchase of new wheelsets.