Cold rolled sheet roll

Cold-rolled sheet (annealed) : The cold-rolled sheet is annealed under the hood before rolling, and the work hardening phenomenon and internal stress are eliminated (greatly reduced) after annealing, that is, the yield strength is reduced close to the cold rolling before.
The cold-rolled sheet coil consists of sheet and coil, which is rolled at room temperature and below the recrystallization temperature. Among them, the delivery of sheets is called steel plate, also known as box plate or plate; The long length and roll delivery are called steel belts, also known as roll plates.
To put it simply, cold rolling is a process rolled out on the basis of hot rolled coil, generally speaking, it is a process of hot rolling - pickling - cold rolling.
Due to the absence of heating in the production process, there are no defects such as pitting and oxide sheet that often occur in hot rolling, and the surface quality is good and the finish is high. Moreover, the dimensional accuracy of cold-rolled products is high, and the performance and organization of products can meet some special requirements, such as electromagnetic properties and deep drawing properties.
1. In appearance, the general chilled coil is a little faint.
2,.surface quality, structure, dimensional accuracy and other cold-rolled plate is better than cold-rolled plate.
3. in terms of performance, due to the cold-rolled coil directly obtained by the cold-rolled process, the cold-rolled coil occurs work hardening during cold rolling, resulting in an increase in yield strength and residual part of the internal stress, and the external performance is relatively "hard", so it is called cold-rolled coil.