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Abstract
Good experience has been accumulated with the use of steels with specified range of hardenability in combination with bulk and surface hardening in deep induction heating of heavy-duty components of rolling stock. In this work the possibility was evaluated of using such a strengthening method for extending the service life of springs used for the suspension systems of railroad wagons. Hardness and microstructure were evaluated and internal and residual stresses were measured. Endurance tests were conducted in three-point bending. The use of steels with specified range of hardenability in combination with bulk and surface hardening ensured savings of rolled metal due to increased reliability and longer life of the springs, reduced expenditure of scarce alloying elements such as Cr, Ni, and Mn in steel production, resulted in savings of fuel, natural gas, and other materials used in the heat treatment process, and led to better working conditions in heat-treatment shops.
Published Version
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