Processing method of copper and copper alloy sheet, strip and foil

Processing method of copper and copper alloy sheet, strip and foil:
Rolling is the basic method for the production of copper and copper alloy strips. Rolling is in a gap between two rolls that have a certain pressure on each other and rotate in opposite directions to roll out the product, and the thickness of the raw material becomes thinner. The rolling deformation process. According to the different methods of supplying billet, the production of copper alloy strip can be divided into four types: ingot rolling method, ingot forging rolling method, continuous casting billet rolling method, and extrusion billet rolling method.
1. The ingot rolling method, usually hot rolling, is to first cast copper and copper alloys into large ingots, and heat them to a certain temperature, that is, higher than the recrystallization temperature of the alloy material, which is generally quite At 0.8~0.9 of the melting point of the alloy, it is hot rolled into a slab or strip. This is the traditional billet-making method for copper processing plates and strips, and it is also a method that is still commonly used today. It has large capacity and high efficiency, and is suitable for multi-variety and large-scale production.
2. The extrusion rolling method mainly refers to the method of continuously extruding the billet into a strip by using an upward continuous casting rod. This method has shown obvious advantages in the production of copper bars. At present, some copper alloy manufacturers have completed the production of 300mm wide-band billets. The reason for the interest in this method is mainly because the investment of this method is much lower than that of the hot ingot rolling method.
3. The ingot forging and rolling method is only used in a few special cases, such as copper alloy slabs with high strength and high conductivity. The plasticity of the ingot is improved by hot forging; the cross-sectional area can also be enlarged by upsetting to create conditions for ensuring the cold deformation processing rate; the directionality of the processed material can also be improved by changing the forging direction, and so on. The production process of copper alloy sheet, strip and foil is mainly composed of hot rolling, milling, cold rolling, heat treatment, surface cleaning, stretching, bending, and shearing. Among them, the production of box materials can be obtained by electrolysis in addition to pressure processing.