Cold rolled plate (also known as cold-rolled sheet) is a steel production process. The process of cold rolling is a metal forming process at a temperature just above the metal recrystallization temperature to increase the work hardening of the material through plastic deformation. The material strength increases, and the value of the yield point is increased when the surface quality is improved.
Cold rolling is a method that uses a pair of cylindrical rubber rollers to squeeze the steel sheet from one side to a desired thickness. Since the rolls are pressed in contact with the sheet during rolling, the surface quality of the sheet is improved compared to the hot-rolled sheet, and the mechanical properties are also improved.
Cold rolled steel plates have excellent formability, smooth surface and high dimensional accuracy and good surface finish. The high strength cold rolled steel sheet not only has high strength, but also has excellent deep drawing property, which is easy to make complex shape workpieces.
High-strength cold-rolled steel sheet is mainly used as a blank for auto parts, household appliances and building materials. It has the advantages of high dimensional accuracy, good surface quality, after painting and plating, and forming various products such as deep drawing and stretching.
Cold rolled plate is widely used in construction, civil engineering, petrochemical, container and rail transportation, medical equipment and other fields. The surface quality of cold-rolled steel plate can reach Sa2.5 level and often reach Sa2 level.
In the production process of steel plate, cold rolling is an important process to ensure the quality of steel plate. Cold rolling is usually carried out at temperatures below the recrystallization temperature of steel, so that the microstructure of steel is broken down, the grains are recrystallized, grain breaking is intensified, and the strength and plasticity of the steel plate are improved.
Cold rolling is generally carried out before hot rolling, and after hot rolling to produce various steel products. For example, cold rolling can obtain thinner and smoother finished product, improve surface quality and strength, shape complex shapes and increase product processing accuracy.
In short, cold rolling is one of the most important processes in the steel industry. It has the advantages of high production efficiency, good surface quality and mechanical properties, low processing cost and short production cycle. It has a wide range of application fields and great development value.
