|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||CFD Modeling and Simulation in Materials Processing
||Effect of Hook Formation during Initial Solidification on Distribution of Subsurface Inclusions in Ultralow Carbon Steel Slabs
||Xiao Pengcheng, Liguang Zhu, Caijun Zhang, Jingyi Zhou
|On-Site Speaker (Planned)
Entrapment of macro-inclusions under the shell surface would lead to the surface quality of final steel products, which is closely related to the formation of oscillation mark hooks during initial shell solidification. In this study, the distribution of inclusions at different depths beneath the shell surface was analyzed by auto-SEM. Water simulations and particle image velocimetry measurements were conducted to reveal the mechanism of inclusions captured by hooks. The results show that the inclusions are maximizing at 1mm depths from the slab surface. Three kinds of inclusion movements in hook region were found, 1. Captured by the meniscus, 2. Captured below the meniscus and 3. Some of captured inclusions return to liquid steel. Most of the inclusions were captured near the meniscus which may lead to the highest inclusions amount near the surface of slab. Additionally, the number of inclusions captured by hooks will reduce with increasing the casting speed.
||Planned: None Selected