Abstract: A coupled electric-magnetic-thermal multi-physical field model for cutter ring was established based on finite element software, and induction tempering simulation was performed on cutter ring with gradient hardness. The results show that during the induction tempering process of the cutter ring, the induced current density and magnetic induction intensity gradually decrease along the radial direction of the ring, with the maximum value occurring at the center of the ring closest to the coil. From the center to the edge direction, the temperature of the ring gradually decreases. As the coil current increases, the induced current density, magnetic induction intensity, core temperature and edge temperature of the ring also increase. As the frequency of the coil current increases, the induced current density, core temperature and edge temperature of the ring also increase, but the magnetic induction intensity decreases. The maximum relative error of the radial temperature of the cutter ring obtained from the experiment and simulation is 8.1%, which verifies the accuracy of the simulation.

Key words: cutter ring, induction tempering, numerical simulation, temperature distribution