The rolling deformation of metal below the recrystallization temperature is called cold rolling, which generally refers to the direct rolling of strip steel at room temperature without heating. The cold-rolled strip may be hot to the touch, but it is still called cold rolling. Cold rolling production can provide a large number of steel plates and strips with high precision and excellent performance. Its main feature is low processing temperature. Compared with hot rolling production, it has the following advantages: cold rolled strip products have precise dimensions and uniform thickness. , The strip thickness difference generally does not exceed O.01-0.03mm or less, which can fully meet the requirements of high-precision tolerances. Ultra-thin strips that cannot be produced by hot rolling can be obtained (the thinnest ones can be less than 0.001mm).
The surface quality of cold-rolled products is superior, and there are no defects such as pitting and pressed oxide scale that often occur in hot-rolled strips. Strips with different surface roughness (glossy surface or rough surface, etc.) can be produced according to user requirements. ) to facilitate processing in the next process. Cold-rolled strip steel has good mechanical properties and process properties (such as higher strength, lower yield limit, good deep drawing properties, etc.). It can realize high-speed rolling and full continuous rolling, with high productivity.
