It refers to the processing of steel plates or steel strips into various types of steel through cold drawing, cold bending, and cold drawing at room temperature.
Advantages: fast forming speed, high output, and does not damage the coating, can be made into a variety of cross-sectional forms to meet the needs of use conditions; cold rolling can cause large plastic deformation of steel, thereby improving the yield of steel point. To
Disadvantages: 1. Although there is no thermal plastic compression during the forming process, residual stress still exists in the section, which will inevitably affect the overall and local buckling characteristics of the steel; 2. The style of cold-rolled steel is generally an open section, which makes the section free The torsional stiffness is low. It is prone to torsion when under bending, and it is prone to bending and torsion buckling when under pressure, and the torsion resistance is poor; 3. The wall thickness of cold-rolled steel is small, and there is no thickening at the corners where the plates are connected, which bears local The ability to concentrate loads is weak.