Cold-rolled steel strip is a metallic material produced by rolling hot-rolled steel strip feedstock through a cold rolling mill at ambient temperature. Typically ranging in thickness from 0.1 to 3 mm and in width from 100 to 2000 mm, it is characterized by high surface finish, excellent dimensional accuracy, and superior mechanical properties. Product forms include coils, coated steel sheets, and various material types such as carbon structural steel, stainless steel, and electrical steel; these are widely utilized in fields such as mechanical manufacturing, the automotive industry, home appliance production, and architectural decoration. The production process encompasses pickling, cold rolling, annealing, and finishing stages; quality is ensured through the precise control of parameters-such as reduction ratio and tension-while leveling processes are employed to enhance strip shape and performance.
Cold-rolled steel strip production lines are equipped with machinery such as combined pickling-rolling units, annealing furnaces, and 20-high rolling mills. The core processes involve hydrochloric acid pickling to remove iron scale, multi-stand continuous rolling, and recrystallization annealing to eliminate work hardening.
