The choice of raw materials is crucial: copper strips are usually made of brass (an alloy of copper and zinc) or pure copper, depending on the application scenario. To ensure the quality of copper strips, manufacturers need to select high-purity copper materials to avoid impurities that affect conductivity, ductility and mechanical strength.<\/p>\n
Alloy composition control: If brass is used, the ratio of copper to zinc, as well as the addition of other trace elements, must be strictly controlled to ensure that the material has the required tensile strength, elongation and corrosion resistance.<\/p>\n
2. Melting and Casting<\/strong><\/p>\n Melting process: Copper and other alloying elements are melted in a set ratio. This process needs to be carried out at high temperature and impurities must be avoided. At the same time, the uniformity of the alloying elements must be maintained during melting to ensure that the material has consistent physical and mechanical properties.<\/p>\n Casting copper ingots: The molten copper is formed into copper ingots through the casting process. The purity and uniformity of the copper ingots will affect the subsequent rolling quality, so the temperature control, cooling speed and other process parameters in this link are particularly critical.<\/p>\n 3. Hot rolling and cold rolling<\/strong><\/p>\n Hot rolling process: After the copper ingot is heated, it is rolled into thinner plates through the hot rolling process. The hot rolling process requires the control of temperature and rolling speed to prevent the material from overheating and causing deformation or cracks. After hot rolling, the material has a preliminary thickness control, but the surface roughness is relatively large.<\/p>\n Cold rolling process: In order to further improve the precision and surface finish of the material, the copper sheet after hot rolling will be further thinned by cold rolling process. Cold rolling can not only accurately control the thickness of the copper strip, but also improve the mechanical properties of the material (such as hardness and toughness) and improve the surface quality.<\/p>\n 4. Annealing<\/strong><\/p>\n Heat treatment annealing: After hot rolling and cold rolling, the internal stress of the copper strip will increase, which may lead to increased brittleness or decreased mechanical properties. Therefore, annealing (heating and gradual cooling) is required to eliminate internal stress and improve the ductility and machinability of the material.<\/p>\n Temperature control: Accurate temperature control during annealing is very important. Too high or too low a temperature will affect the final performance of the copper strip. After proper annealing, the copper strip will become softer and have higher toughness and plasticity.<\/p>\n 5. Surface treatment<\/strong><\/p>\n Descaling: During the rolling and annealing process, scale may form on the surface of the copper strip, which will affect the conductivity and aesthetics of the material. Therefore, it is necessary to remove the surface oxide by pickling or other chemical treatment to ensure that the surface of the copper strip is smooth and free of defects.<\/p>\n Surface coating: Depending on the application requirements, the copper strip may need to be surface coated (such as tin plating, nickel plating, etc.) to enhance its corrosion resistance or conductivity. The uniformity of the surface treatment, coating thickness and adhesion all need to be strictly controlled to ensure the long-term performance of the copper strip in use.<\/p>\n![\"\"](\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2024\/09\/2024092316241924.jpg\")