... ; for hardening; for annealing; IGBT Intermediate frequency induction hot forging machine (5-20Khz) Main features 1.Adopt IGBT technology, ... accessory, kitchen and table ware, art ware, standard part, fastener, fabricated mechanical part, bronze lock, rivet, steel pin and pin.2 ... Annealing of various other metal work pieces, such as golf ball head, cue, brass lock, hardware copper fitting, kitchen ...