The principle of cold drawing strengthening of forged round bar

It is better to purchase Baosteel's materials when doing cold drawing,forged round bar because Baosteel's materials have undergone first-level flaw detection processing, and the density of the steel is relatively good. After the cold drawing is heated,forged round bar it is convenient to make the line. The steel is cold drawn at room temperature to produce plastic deformation, thus To increase the yield strength,forged round bar this process is called cold-drawn strengthening. 42CRMO cold drawn round steel is generally used for high-demand product parts, with good willfulness and strength,forged round bar and the surface after cold drawing is better

The principle of cold drawing strengthening: the defects of the crystal lattice of steel increase in plastic deformation,forged round bar and the serious distortion of the defect crystal lattice will hinder the further slip of the crystal lattice, so the yield point of the steel increases,forged round bar and the plasticity and toughness decrease. Due to internal stress generated during plastic deformation, the elastic modulus of the steel is reduced. The cold-drawn steel bars are stored at room temperature for 15-20 days or heated to 100-200°C for a certain period of time. This process is called aging treatment.

After cold drawing,forged round bar the yield point of the aged steel bar is further improved,forged round bar the ultimate tensile strength also increases, and the plasticity continues to decrease. Due to the reduction of internal stress during the aging process,forged round bar the elastic modulus can be basically restored. Construction sites or prefabricated component factories often use this principle to cold-drawn or cold-drawn steel bars or low-carbon steel wire rods according to a certain system to improve yield strength and save steel. The principle is similar to the three-roller bending machine. The bending machine is three points to determine a circle. Adjust the height to adjust the curvature.