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What is the difference between hot rolled copper strip and cold rolled copper strip?

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Br /> difference between hot rolled copper strip and hot rolled copper strip; Cold rolled copper plate is green and shiny
copper plate and strip is actually a general term for copper plate and strip. Copper plate refers to the rolled plate of copper. Rolling includes hot rolling and cold rolling. Copper strip refers to copper rolled products with a thickness of 0.06 ~ 1.5mm. Copper strip can be classified according to different brands, which can be roughly divided into brass strip, red copper strip, bronze strip and white copper strip
production process of copper strip:
1. Hot rolling production process of ingot: melting → casting (vertical semi continuous casting or vertical continuous casting) → (sawing) → heating → hot rolling → milling → cold rolling → heat treatment → finishing → packaging and warehousing
ingot hot rolling process is the most widely used mainstream production process at this stage
2. Horizontal continuous casting production process: melting → horizontal continuous casting strip → (annealing) → milling → cold rolling → heat treatment → finishing → packaging and warehousing
horizontal continuous casting production process is used to produce alloy varieties with difficult hot rolling (such as tin phosphorus bronze and lead brass)
the process is short, the production cost is low, and the equipment occupies less ground
at this stage, the production of alloy is relatively single, the loss of mold is large, and the uniformity of upper and lower surface microstructure of billet is difficult to control
3. Production process of up lead continuous casting method: smelting → up lead strip → (milling) → cold rolling → heat treatment → finishing → packaging and warehousing
up lead continuous casting method is a newly developed short flow production process in China, which is used to produce red copper
it has short production process and low energy consumption
4. Vertical bending continuous casting production process: smelting → vertical bending casting → (hot rolling) → (milling) → cold rolling → heat treatment → finishing → packaging and warehousing
it has high production efficiency, short production process and low energy consumption
5. Roller /double belt continuous casting production process: melting → roller /double belt continuous casting → (hot rolling) → cold rolling → heat treatment → finishing → packaging and warehousing
roller /double belt continuous casting production process is a short flow production process under development
it has short production process and low energy consumption
6. Production process of continuous extrusion method: smelting → upper copper lead rod → continuous extrusion → cold rolling → heat treatment → finishing → packaging and warehousing
the continuous extrusion process mainly produces copper bars and copper flat wires
the strip width and product variety are limited.

in terms of the physical properties of materials, there is an essential difference between hot rolling and cold rolling. Hot rolling is the effect of changing the physical and mechanical properties of objects through high temperature, and then changing their shape through pressure. After hot rolling, the plate needs heat treatment and other processes to complete the physical and mechanical properties of the plate
cold rolling is achieved by changing the shape of the object by changing the pressure, and the performance of the material itself remains unchanged

hot rolled copper plate is yellowing and less shiny
cold rolled copper plate is cyan and shiny

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