It is a type of surface hardening in which a metal part is induction heated and then quenched . It increases the hardness and brittleness of the part . Induction hardening is used to selectively harden areas of a part or assembly without affecting properties of that part.
Induction hardening is a non contact heating process which uses the principle of electromagnetic induction to produce heat inside the surface layer of workpiece . By placing a conducting material into strong magnetic field, electric current can be made to flow in the material by creating heat due to I2R losses in the material . In magnetic material , further heat is generated below curve point due to hysteris losses
- Fast process
- No scaling
- High wear and fatigue resistance
- Localized, constant and precise heating