What are the factors affecting the hardened layer of gear induction hardening?

On the one hand, parameters such as the heating frequency, output power, sensor moving speed, and sensor gap of the induction hardening machine tool are determined to control the heating speed and current penetration depth; on the other hand, the cooling capacity of the quenching cooling medium and spray device controls the cooling penetration. The depth of the quenching and hardening layer required by the design is achieved by adjusting two factors.