The company purchased materials, produced by extrusion of copper demand, now the market feedback fracture phenomenon may be material problems, how to seek and lead cast copper copper extrusion test, metallographic analysis can be used to fix it,
2, optical microscope, metallographic microscope is used to observe the microstructure analysis of copper internal inspection, professionals to be able to look out.
3, the same two bundles of copper color, specifications, extruded in color than the bright point of continuous casting, continuous casting copper extrusion ratio often teachers can see.
The copper fracture problem, most likely is the production of raw materials of copper has a problem, which contains too many impurities, not excluding copper production when the extrusion temperature too low or too fast caused.With the continuous casting copper extrusion (you said lead cast, well, like seldom hear such a call) can be distinguished from copper in three ways1, to distinguish from the weight, ratio of copper to copper extrusion casting, continuous casting of ordinary brass rod conversion percentage is 66%, the more high extrusion.
