论文部分内容阅读
薄板坯连铸工艺的H2漏斗形结晶器可以生产宽度860～1 730 mm的铸坯。对不同宽度H2结晶器内钢液流动、传热凝固行为进行研究,能加深了解H2结晶器内的冶金行为,并为H2薄板坯连铸设备制造及工艺参数优化提供指导。采用数值模拟技术研究拉速4.5 m/min时,宽度900、1 300、1 700 mm结晶器内钢液流动、传热凝固行为。结果表明:结晶器宽度增加,流场变化显著,钢液自由液面近水口处波动加剧。不同宽度下,结晶器出口处铸坯坯壳厚度及其表面温度的差别主要体现在靠近铸坯窄边处。
The H2 hopper mold for the thin slab continuous casting process produces slabs with a width of 860 to 1 730 mm. The research on the flow and heat transfer and solidification behavior of molten steel in H2 crystallizers with different widths can deepen the understanding of the metallurgical behavior in the H2 crystallizer and provide guidance for the fabrication of H2 thin slab continuous casting equipment and the optimization of process parameters. Numerical simulation was used to study the flow and heat transfer and solidification behavior of molten steel in 900,1 300 and 1 700 mm molds with a drawing speed of 4.5 m / min. The results show that the width of crystallizer increases, the flow field changes significantly, and the fluctuation of free liquid surface near the nozzle increases. Under different widths, the difference between the thickness of billet shell and its surface temperature at the outlet of the mold mainly lies in the narrow edge near the slab.