Development of Cooling Process Control System for Backward UFC in CSP

Abstract:

Backward Ultra-fast cooling (UFC) plays a key role in low-cost dual-phase steels production. Cooling process control system for backward UFC was developed to meet the process requirements. Basing on basic theory of heat transfer, cooling control model was established to accomplish temperature calculation. To deal with the influence of technological conditions fluctuations an adaption system, including self-learning function and feedback function was proposed to intelligently realize temperature correction. The developed cooling strategy can achieve diversified cooling path control. The controlling of significant technological parameters, including cooling rate and air cooling time for dual-phase steels, was also accomplished. Furthermore, flexible and diversified UFC strategies were developed aiming at high temperature precision and low temperature deviation control in thickness direction. The system has been applied successfully in dual-phase steel production with high stability and reliability. The precision of medium temperature (MT) can be controlled within ±10°C, and the UFC delivery temperature (UFC-T) can be limited within ±30°C of the target values.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 482-488
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.482
• Online since: March 2016
• Authors: Xu Dong Li, Guo Yuan, Zhen Lei Li, Zhao Peng Zhang, Xin Li Cao, Guo Dong Wang
• Keywords: Cooling Process Control System, Cooling Strategy, CSP, Dual-Phase Steel, Ultra-Fast Cooling

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