... Heat treatmentautomoble, motorcycle accessories high-frequency hardening heat treatment. For example: crank shaft, ram, piston pin, camshaft, ... parts, fasteners through thermal forming.hardware tools diathermy,for example : pliers and spanners heating-diathermy-forming. ... Melting/SmeltingMedium frequency induction melting machines are mainly used for the melting of steel, stainless steel, copper, ...