Cold-rolled packaging steel strip production process

Cold-rolled packaging steel strip production: cold rolled steel strip packing has the advantage of product is very thin, size tolerance is very small, good surface quality and mechanical properties. Cold-rolled packaging steel strip production of the main processes are: raw material plate volume of acid pickling, cold rolling, degreasing, annealing, flat and coating. The thickness of the product is 0. 25 - 3. 5 mm, roll length 700-1 At the end of the 2, 135 mm, frame for 25 - rolling speed 30-27 m/s, the heavy 45 tons. Degreasing is the removal of surface oil pollution, the purpose of to avoid pan is generated on the spot when annealing. The purpose of annealing is to eliminate the strain hardening. Before cold rolling, so repeatedly, until the required thickness. Products of heat treatment, is actually a small compression ratio of cold milk, it can improve the straightness of the plate, the roughness and the performance of the panel. The packaging steel strip coating has two kinds of coating metal and nonmetal. The former includes the tin plating and galvanized iron, etc. The latter including enamel, etc.