Cold rolling continuous
After annealing of cold-rolled steel coil finishing must be carried out, including the cutting head, tail, cutting, flattening, smooth, rewinding or vertical clipboard and so on. Cold-rolled products are widely used in automobile manufacturing, electronics, instrumentation switches, construction, office furniture and other industries.
Cold rolling is a hot-rolled coil as raw material, the acid descaling. The finished product is rolling hard volumes, due to the work hardening cold deformation of the strength of continuous rolling hard volumes, increased hardness, tough plastic index fell, so that the pressing performance will deteriorate, can only be used for simple modification of parts. Rolling hard volumes can be used as raw material for hot-dip galvanizing plant, because hot dip galvanizing line is provided with annealing line.
Usually cold rolling plate, coil should be evaluated by continuous annealing (CAPL unit) or batch annealing and rolling to eliminate cold-hardening of stress reaches the mechanical properties of the corresponding standard indicators.
Cold-rolled steel surface quality, appearance, dimensional accuracy are better than hot-rolled sheet, and its products can be as thin thickness of about 0.18MM.
In rolling roll as a substrate for deep processing of products, a high value-added products. Such as galvanized, hot galvanized, electro-galvanized and fingerprints, painted steel coil and damping composite steel, PVC laminating steel, so that these products are beautiful, high-quality anti-corrosion.
Cold formed steel
Cold forming is not heated in the case of material punching, bending and stretching of processing. Cold forming process are cold heading, cold-rolled, forging and so on.
main advantages of cold formed steel:
1, compared with the thick hot-rolled steel, cold-formed steel can be processed into suitable smaller loads and shorter span.
2, can be obtained economically unusual cross-sectional shape by cold forming, to obtain a satisfactory strength to weight ratio.
3, considering the compact packaging and transport of produce can be nested section.
4, no telescopic gravity environment becomes invisible.
Post time: Oct-29-2019