Development of key technology of generous slab crack control
HE Yu-ming1，HU Bing1，LIANG Qing1，CHEN Wen-man2，ZHANG Chao-ying1
1. No.1 Steelmaking Plant of Chongqing Iron and Steel Co., Ltd., Chongqing, 401258, China 2. Chief Engineer’s Office of Chongqing Iron and Steel Co., Ltd., Chongqing, 401258, China
Abstract：In the new process of steelmaking in Chongqing steel, the key technology of controlling surface and the internal cracks of the generous slab was developed and optimized. Good results were achieved. By optimizing the nozzle flow field, stabilizing liquid level height, controlling equipments precision, optimizing secondary cooling intensity and distribution, and using the high alkalinity mold powder, protecting casting with ladle long nozzle, the slab surface cracks were controlled. Strengthening the basic work, controlling assembly precision of spare parts, controlling the segments installation precision, ensuring enough uniformity and strength of secondary cooling, adopting dynamic light pressure and the dynamic water distribution technology, using macrostructure prediction technology for the internal cracks of slab and segments’ stress monitoring technology, the internal cracks were controlled.
何宇明，胡 兵，梁 庆，陈文满，张朝映. 连铸宽厚板坯裂纹控制关键技术的开发[J]. 中国钢铁期刊网, 2015, 34(5): 45-48.
HE Yu-ming，HU Bing，LIANG Qing，CHEN Wen-man，ZHANG Chao-ying. Development of key technology of generous slab crack control. Chinese Journal of Iron and Steel, 2015, 34(5): 45-48.
2015, Vol. 34 
