Simulation of Induction Surface Hardening of Large Bearing Rings Using Volume Heat Sources – Part 2

Abstract In part 1 of this publication, it has been successfully shown, that volumetric heat sources can be used to replace electromagnetics when modelling induction surface hardening in scanning mode. Thereby, simulation models could be simplified, especially for components, such as large bearing rings. Three-dimensional heat sources have been determined from temperature measurements during induction surface hardening in scanning mode. Simulated temperature-time profiles agreed well with measurements, even if the process parameters differ from those used to determine heat source parameters. In part 2 of this publication, phase transformations will be added to the model to calculate microstructures and hardness in the surface hardened layer. This allows for model validation by metallography and hardness testing. Finally, a thermo-metallurgical model of surface induction hardening of large bearing rings in scanning mode using volumetric heat sources instead of electromagnetics has been successfully implemented.