薄板坯连铸连轧技术发展现状及展望

自1989年第一条产线投产以来，薄板坯连铸连轧技术已经走过30多年的发展历程。在这个过程中，通过对其技术不断探索和创新，推动了薄板坯连铸连轧技术不断向前发展。在钢铁工业碳中和战略目标背景下，以薄板坯连铸连轧为代表的近终形制造技术得到了行业的极大关注。本文主要回顾了薄板坯连铸连轧技术的发展，分析其关键工艺装备的演变历程，并根据其连续化程度将薄板坯连铸连轧划分为单坯、半无头和无头三代技术；分析了薄板坯连铸连轧流程的工艺特点及物理冶金特征，在此基础上提出了其产品定位，重点介绍了其代表性产品如中高碳钢、热轧高强钢及电工钢等的开发与应用现状。最后，对薄板坯连铸连轧技术未来的发展进行了展望，提出连续化、专业化、智能化将是未来重要发展方向。 

Thin slab casting and direct rolling technology: Current status and prospects

Thin slab casting and direct rolling (TSCR) technology has experienced 30 years of development since the first production line was commissioned in 1989. Owing to consistent and successful exploration and innovation by engineers and researchers, rapid progress in TSCR technology has been witnessed. Under the background of carbon neutrality, the steel industry encounters tremendous pressure for low carbon emissions. As one of the representative near-net-shape steel manufacturing technologies, TSCR technology has attracted extensive attention. This article reviewed the development history and evolution of critical process equipment for the TSCR technology. According to the continuous extent of the manufacturing process, the TSCR technology can be classified into the following three generations, i.e., batch rolling, semiendless rolling, and endless rolling. With the improvement of the continuity of TSCR technology, the production line is greatly shortened, especially the third-generation technology, the endless strip production line. Meanwhile, the increase in continuity substantially increases productivity, production yield, and energy efficiency and expands the thinnest strip thickness down to 0.6 mm. Additionally, the specific characteristics of processing and physical metallurgy of TSCR technology were analyzed. Based on its characteristics of rapid solidification, heavy reduction per rolling pass, and uniform temperature distribution, TSCR technology was suggested to produce special steel, high strength steel, silicon steel, and thin gauge products. New advances on the development of representative products for TSCR technology, e.g., medium- and high-carbon steels, high-strength hot-rolled steels, and silicon steels, and their practical application status were discussed. Finally, this work envisaged the future development directions of TSCR technology and proposed that making the process more concise and continuous, developing product-oriented production lines, and coupling intelligent manufacturing with TSCR technology will be important development directions in the future.