Residual stress control of hot-rolled strips during run-out table cooling

The strips with good flatness after finish rolling will have defects such as edge wave run-out table cooling. These are caused by the residual stress due to inhomogeneous thermal and microstructural behaviors during cooling stage. traditional control methods rely too much on experience, resulting in poor effect universality. Therefore, this study proposed two based model calculation: water flow central crown center compensation control. former is mainly controlling uniformity of strip transverse temperature microstructure. latter controlled mutual internal stresses. In paper, mathematical models critical were established, respectively. Meanwhile, a post-buckling hot-rolled was established calculate aim value at exit finishing mill under stress. Furthermore, fully coupled finite element temperature, phase transitions, developed it verified using experimental data. Finally, above realized model. results showed that can reduce improve flatness, application more effective.