How to solve the overheating phenomenon of heating metal in induction heating furnace?

We know that induction heating furnace heating has different heating temperatures according to different materials. If the temperature is too high in the process of heating the metal workpiece, the grains in the metal material will appear coarse, causing mechanical properties. decrease, especially the impact toughness. If the workpiece is overheated, we can improve it by normalizing or quenching, but it should be noted that the coarse crystal structure cannot be completely eliminated. Therefore, the overheating phenomenon of induction heating furnace is also very harmful.