Research on Shape Control During Tandem Cold Rolling of High‐Strength Low‐Alloy Strip Based on Genetic Influence of Property

High‐strength low‐alloy (HSLA) strip combines high strength with excellent formability, yet its constraints make cold rolling more challenging, leading to frequent shape defects during production. To investigate and control the causes of such defects, a multistand 3D continuous rolling simulation model was developed based on industrial data, integrating the widthwise property variations of HSLA thin strip with a data genetic mechanism. The relative errors of the calculated rolling force and center thickness for each rolling pass model are controlled within ±7% and ±0.15%, respectively. Based on this model, the differentiated regulation mechanisms of work roll bending (WRB) and intermediate roll bending (IRB) on the shape evolution of HSLA strip were elucidated. WRB regulation shows clear stage‐dependent behavior: weak in early stands with relative thickness and length differences within ±2.5, nonlinear in intermediate stands driven by genetic inheritance effects, and saturating in final stands. IRB improves flatness in intermediate stands by enhancing center reduction and reducing edge‐to‐center differences but has a weaker overall effect. WRB directly affects work roll deflection and exit strip crown, while IRB may cause overcompensation in the final stand. Overall, the low deviation flatness zones for all forest stands are concentrated within the range of ≈100–250 kN for WRB and 100–300 kN for IRB.