... ; for hardening; for annealing; 200KW intermediate frequency induction heating machine, welding brazing, hardening, quenching(1-20KHz) Main features ... reduces th cost when producing. Application of Induction heating machine: Heating (hot forging, hot fitting and smelting) 1.Hot ... aluminum products. 250KW intermediate frequency induction heating machine, welding brazing, hardening, quenching(1-20KHz)