Rolling process characteristics

(1) the use of process lubrication and cooling, in order to reduce the deformation resistance of rolling and cooling roll;

(2) High tension rolling is used to reduce deformation resistance and maintain the stability of the rolling process. The average unit tension value used is 10% ~ 60% of the material yield strength, generally not more than 50%;

(3) adopt multi-roll rolling. Due to the work hardening caused by cold rolling, it becomes difficult to continue deformation when the total deformation amount reaches 60% ~ 80%. Therefore, intermediate annealing is needed to make rolling continue after material softening. This intermediate annealing may take place several times to obtain the required thin strip. The rolling between two intermediate anneals is called a rolling course. The annealing of cold rolled strip is carried out in a continuous annealing furnace or hood annealing furnace with protective gas. Minimum cold rolled strip thickness up to 0.05mm, cold rolled foil up to 0.001mm.

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Cold rolled strip is widely used, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, canned food, etc. Cold rolled sheet steel is the abbreviation of common carbon structural steel cold rolled sheet, also known as cold rolled sheet, commonly known as cold plate, sometimes mistakenly written as cold tied sheet. Cold plate is made of ordinary carbon structural steel hot rolled steel strip, after further cold rolling into a thickness of less than 4mm steel plate. Due to rolling at room temperature, does not produce iron sheet, therefore, cold plate surface quality, high dimensional accuracy, coupled with annealing treatment, its mechanical properties and process properties are better than hot rolled thin steel sheet, in many fields, especially in the field of home appliance manufacturing, has gradually replaced hot rolled thin steel sheet.