A new surface induction hardening technology was for the first time in Europe developed in BONARTANS GROUP Company for the purpose of increasing the safety and resistance of railway axles to fatigue damage. The operation of railway axles should fulfil two main demands: higher safety and low operation costs. A significant part of operation costs is given by frequency of regular inspection intervals which should reveal potential fatigue cracks in railway axle. Fatigue tests and tests of crack initiation and crack growth tests performed on induction hardened railway axles produced from steel quality EA4T and EA1N are compared with the results obtained from the standard heat treatment of railway axles. The comparison clearly demonstrates the benefits of new technology of surface induction hardening.Keywords: Railway axle, induction hardening, crack initiation, crack growth, fatigue limit
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