... annealing; 90KW intermediate frequency induction braze welding machine, hardening, quenching(1-20KHz) Main features 1.Adopt IGBT technology, with ... to the smelting of iron, steel, copper, aluminum, zinc as well as various noble metals. Heat treatment (surface quench): It’s ... is mainly applicable to the braze welding circular, square as well as other irregular plain pot bottom. It is also applicable ...