1, pure copper tube process advantages:
①Melting and casting process advantages: the use of reflector furnace melting or industrial frequency core induction furnace melting; the use of copper mold or iron mold casting, the melting process should be minimized to reduce the source of gas, and the use of calcined charcoal as a flux, can also be used as a phosphorus deoxidizer. The casting process is carried out under nitrogen protection or covered with soot, the recommended casting temperature of 1150-1230 ℃, the line shrinkage of 2.1%
② Advantages of molding performance: excellent cold and hot working performance, can be processed with a variety of traditional machining processes, such as stretching, calendering, deep punching, bending, fine pressing and spinning. The heating medium atmosphere should be controlled during hot working so that it is slightly oxidizing. Heat processing temperature of 800-950 ℃.
③ Welding performance advantages: easy to tin welding, copper welding, but also gas shielded welding, flash welding, electron beam welding and gas welding, but should not be contact point butt welding and submerged arc welding.
④Cuttable (HPb63-3 cutting 100%)/%: 20
2、Phosphorus deoxidized copper tube process advantages:
①Melting and casting process advantages: the use of industrial frequency core induction furnace melting. High-temperature pure copper gas absorption, melting should minimize the source of gas, and the use of calcined charcoal as a flux, can also be used as a phosphorus deoxidizer, casting process in nitrogen protection or covered with soot, casting temperature of 1150-1180 ℃.
② Advantage of molding performance: excellent cold and hot working performance, can be fine blanking, stretching, pier riveting, extrusion, deep drawing, bending and spinning. Hot processing temperature of 800-900 ℃.
③ Welding performance advantages: easy to braze welding, gas shielded welding but not suitable for resistance butt seam welding.
④ Cutability (HPb63-3 cutability is 100%) / %: 20
3、Phosphorus deoxidized copper tube process advantages:
① melting and casting process advantages: the use of public frequency core induction furnace melting, raw material selection Wcu>99.97% and Wzn<0.003% copper electrolytic. Melting should minimize the source of gas, and the use of calcined charcoal as a flux, can also be used as a phosphorus deoxidizer, burn casting process in nitrogen protection or covered with soot under the casting temperature of 150-1180 ° C
② molding performance advantages: excellent cold and hot working performance, can be processed with a variety of traditional processing techniques, such as stretching, calendering, extrusion, bending, stamping, shearing, upsetting calcined, spinning calcined, knurling, winding, spinning, thread rolling and so on. Malleability of several good, 65% of the forging brass, hot working temperature of 800-900 ℃.
③ Welding performance advantages: easy to weld, brazing, gas shielded welding but not suitable for metal arc welding and most resistance welding
④ Cutting (HPb63-3 cutting for 100%)/%: 20
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