... temper,normalizing),braze welding,smelting,copper bar annealing,bar copper heating before forging, and so on.Example :1.various kind of ... 3.drill bit welding. 4. Bar stock belowΦ25 through heating,speed faster than silicon controlled, Φ60mm-Φ100mm bar stock through ... .Φ1016mm,depth 17.5mm steel tube1000 degree centigrade heating bending. 8.steel tube heating necking down 9. copper bar annealing, wire ...