Roof tile machine factory display

Support customization of roof tile machines with different tile types

Because it has not undergone annealing, its hardness is very high (HRB greater than 90), and its machinability is extremely poor, only allowing for simple directional bending processing of less than 90 degrees (perpendicular to the coiling direction).

In simple terms, cold rolling is processed and rolled based on hot rolled coils, generally following the processing sequence of hot rolling → pickling → cold rolling.Cold rolling is made from hot rolled sheets at room temperature, although the rolling process does cause the steel plate to heat up, it is still referred to as cold rolling.

Cold rolling that is formed by continuous cold deformation from hot rolling has relatively poor mechanical properties, with too high hardness, and must undergo annealing to restore its mechanical properties; without annealing, it is called hard-rolled coil. Hard-rolled coils are generally used for products that do not require bending or stretching, and those with a thickness of 1.0 or less may have a lucky chance of bending on either two or four edges.