This process involves heating applied rapidly and locally to the steel component followed by quenching. High frequency electric fields quickly heat the surface of the component via induction coils, which is then quenched using water. This results in a localized hardened layer at the surface. Different shaped induction coils are available and can be made to suit. Induction hardening offers a cost-effective low-distortion surface hardening treatment to steels, particularly large components where an increase in surface hardness is required whilst maintaining core properties.
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