Production process of cold-rolled packaging steel strip

Production of cold-rolled packaging steel strip: The advantages of cold-rolled packaging steel strip are that the product is very thin, the dimensional tolerances are small, and the surface quality and mechanical properties are better. The main processes of cold-rolled packaging steel strip production include: pickling, cold rolling, degreasing, annealing, leveling and coating of raw coils. The thickness of the product is 0.25-3.5mm, the length of the roll is 1 700-2 135mm, the rolling speed of the final stand is 25-27m/s, and the weight is 30-45 tons.
　　The purpose of degreasing is to remove oil stains on the board surface to avoid spots on the board surface during annealing.
　　The purpose of annealing is to eliminate work hardening. After that, cold rolling is performed, and this is repeated many times until the required thickness is reached.
　　The heat treatment of the product is actually a kind of cold emulsion with a small compression rate, which can improve the flatness, roughness and performance of the board surface.
　　The coating of packaging steel strip has two types: metal coating and non-metal coating. The former includes tin plating and zinc plating. The latter includes enamel and so on.