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Technology of ultrasonic finishing treatment for locomotive wheel pair type

An increase of wear resistance and improvement of tribotechnical properties of wheels of locomotives is an urgent scientific and technical problem. In the forefront are the questions, connected with the improvement of properties of surface wheel flanges and transformation of the surface layer structure. The application of ultrasonic finishing treatment enables to solve the given problem completely. The first stage in the solution of the problem was the research of influence of the ultrasonic treatment on the structure and physical and mechanical properties of the ferrite-pearlite steel wheel and matching optimum modes of processing. Integrated researches of morphology of a surface, macro and microstructure, nano- and microhardness, hardness and wear resistance of wheel tread with ultrasonic treatment, obtained in manufacturing, set outcomes of preliminary researches. The obtained outcomes enabled to offer the given technology for the usage when repairing and producing railway wheel pairs.