Abstract:In order to reduce the large residual stresses, which is generated in the production of high-strength plates during the quenching process and results in plate defects and product quality degradation. Numerical calculations of residual stresses, experiments and thermodynamic coupling simulations were carried out to study the changes of residual stresses during the whole process of straightening of Q960E high-strength steel. After quenching and heat treatment, a compressive stress of about 276.3 MPa was formed on the surface of the high-strength plate, and a tensile stress was formed in the opposite direction. The results showed that the roll straightening process could effectively reduce the residual stress of the sheet, and had a greater effect on the surface residual stress and a smaller effect on the core residual stress. This result also verifies the correctness of the calculation model for calculating the residual stress, which provides an effective calculation method for the straightening process to reduce the residual stress of the sheet.