... all classes of machine parts heattreating(quenching,anneal, temper,normalizing),braze welding,smelting,copper bar annealing,bar copper heating before ... heating,speed faster than silicon controlled, Φ60mm-Φ100mm bar stock through heating 5.chain,chain wheel heat treatment ... steel tube heating necking down 9. copper bar annealing, wire annealing 10. machine tool guideways gear,chain wheel quenching 11 ...