The production technology of cold plate

Commonly used ordinary steel sheet thickness is 1. 5 ~ 6 mm hot rolled strip steel for cold rolled billet. Main processes are pickling, cold rolling, degreasing, annealing, flat, shear, Transverse and longitudinal cutting) , if the production coating plate and tin plating, thermal tin-plate, such as thermal coated zinc coating or coating process. Cold rolled billet production process is: hot-rolled coil, The raw material) — Pickling & ndash; Cold rolled & ndash; Skim & ndash; Annealing & ndash; Smooth & ndash; Shear & ndash; The finished product delivery. Cold rolled billet continuous pickling must go through before rolling iron oxide, to ensure that the strip surface is bright and clean, smooth implementation of cold rolling and after surface treatment. After pickling can rolling, but because of the cold rolling process characteristics, rolling must be annealed to soften steel to a certain thickness. But in the process of rolling, strip surface of lubricating oil, and grease can evaporate in the annealing furnace, volatiles of the formation of dark spots on the strip surface and it is difficult to eliminate. Before annealing, therefore, should be washed clean grease on the surface of the steel strip, the degreasing process. The strip after degreasing, annealing in the shielding gas. After annealing of steel strip surface light, further rolling or flat, you don't have to pickling. After annealing strip must be level off, to get a flat, smooth surface, uniform thickness, and make the adjustment performance. Level off, according to the order requirement for shearing strip.