Abstract:
High-strength steel plates are widely applied in automotive, energy and other fields due to their excellent comprehensive properties. However, the hot strip rolling of high-strength steel faces common problems including excessive transitional materials generated during rapid product specification switching, low plate shape control accuracy and severe rolling mill vibration, which seriously limit the production stability and quality consistency of high-strength steel. This paper reviews the latest research progress of key intelligent stable rolling technologies and full-process intelligent management and control technologies for the hot strip rolling of high-strength steel. Aiming at the low setting accuracy of traditional mechanism and statistical models, the mechanism and data dual-driven modeling method serves as an effective approach to improve the control accuracy of rapid product specification transition and stable rolling process for high-strength steel. Meanwhile, the vibration suppression technology for thin-gauge high-strength steel has evolved from the single mode of equipment supervision and parameter optimization to a systematic management mode from the process genetics perspective covering the full process of heating, descaling and rolling. Combined with the data-driven active disturbance rejection control technology, this technology realizes accurate vibration suppression during the high-strength steel rolling process. To achieve real-time monitoring of complex rolling states, an integrated comprehensive diagnosis and analysis technology incorporating multi-source data diagnosis, single coil/unit intelligent analysis and intelligent product quality scoring is developed. Finally, the construction of collaborative management and control technology for rapid product specification transition and stable rolling realizes the optimal configuration of roll profile, dynamic adjustment of production scheduling and hierarchical optimization of plate shape models. This technology significantly improves the overall regulation capability of the high-strength steel hot strip rolling process and increases the production proportion of high-strength steel. This paper clarifies the technical framework and development trends in this research field, and provides theoretical references for the intelligent and green development of hot strip rolling in the future.