... hardening; for annealing; IGBT Intermediate frequency induction hot forging machine (5-20Khz) Main features 1.Adopt IGBT technology, with ... , so it reduces th cost when producing.induction welding machine Application of Induction heating equipment: Heating (hot forging, ... 2.Quench for various automobile and motorcycle fittings, such as crankshaft, connection rod, pinton pin, chain wheel, aluminum wheel, ...