Defect analysis of copper strip

Defect analysis of copper strip

As a more widely used metal material, copper belt for many friends are not unfamiliar. However, in the actual production and use process, it is also there are some defects, the following is a simple understanding of this material defect analysis related knowledge.

The orange peel phenomenon occurs in the large bending deformation of the copper strip after processing, which may be caused by the coarse grain of the copper strip due to the unreasonable annealing process. Cold processing is the rolling process is not reasonable, resulting in coarse grain; There is also the smelting process of ingot crystal grains are not uniform and coarse; The grain size of copper strip is coarse due to repeated annealing in continuous rolling process.

When the copper strip appears the above situation, it is necessary to clarify the annealing process of the reformed material, not repeated annealing; The rolling process should be matched with the annealing process; Control the casting temperature and cooling process of melting; The cup test must be carried out on the finished product of the restructured material with thickness of 0.5mm to less than 0.5mm.

When the copper strip ingot black, deformation and obvious melting copper leakage phenomenon, the reason may be hot rolling stepper furnace temperature is too high, cast ingot in the stepper furnace time is too long caused by this situation will quickly overburnt ingot with the car off the track, can not affect the continuity of hot rolling, so as not to cause batch overburning, but also check the stepper furnace temperature control equipment, If the temperature setting is too high or the equipment fails, the overburned ingot can not be hot rolled into the furnace again. Before hot rolling, ensure that the temperature control equipment in the stepper furnace and the stepper transfer equipment are normal.