Residual Stress Distribution Characteristics and Influencing Factors of 316L/Q235 Composite Plate during Heat Treatment

In order to explore the influence of different factors on the residual stress distribution of 316L/Q235 composite plate during the heat treatment, the stress distribution was analyzed theoretically and the theoretical prediction model of residual stress distribution was built. Then, finite element simulation is carried out with Abaqus software to verify the accuracy of the theoretical prediction model. Through theoretical prediction model, the influence of different factors on distribution of residual stress was discussed. The results show that a certain degree of tensile load can reduce the residual stress on the surface and near the interface of the Q235 base layer, increase the residual stress on the surface of the 316L coating layer. With the increase in the total thickness of the composite plate, the tensile stress near the interface of the 316L coating layer increases slightly and the compressive stress on the surface of the 316L coating layer increases significantly. With the decrease in the composite ratio, the residual stress inside and on the surface of the 316L coating layer increased obviously and the variation range tends to be relatively uniform.