Induction Hardening is a process in which a metal component is heated by an induction coil to a temperature just below its melting point and then rapidly cooled. This process increases the surface hardness of the component, allowing it to withstand higher levels of stress and wear. The induction coil generates a high-frequency alternating current that passes through the component, which causes it to heat up. The component is then quenched in oil, water, or other coolant, depending on the material and application, to rapidly cool the component and help it retain its hardness.