... ; for quenching; for hardening; for annealing; IGBT Intermediate Frequency Induction Heating Machine (5-20Khz) Main features 1.Adopt IGBT ... to melt the metal into liquid by using the high temperature, which is applicable to the smelting of iron ... such as hardware toilet and kitchen products refrigerating copper fitting, lamp decoration fitting, precision mold fitting, hardware handle, eggbeater, ...