Presidential Young Investigator Award: Mathematical Modeling of Continuous Casting Processing

该项目将开发应用数学模型，利用凝固过程中瞬态热应力发展的有限元模型来模拟静态铸锭中的二维热流和应力发展。目的是继续应用数学模型、工业实验和冶金研究，以增加对其他金属铸造工艺的理解和解决问题。尽管这些模型仍然不完整，但已经帮助我们更好地理解了以下问题：流体从浸入式喷嘴流出、连续板坯连铸结晶器的变形形状、钢在高温下的力学行为、高质量钢的铸造问题，如夹杂物夹带和由于壳射流撞击凝固钢壳而导致的壳变薄。不锈钢板坯由于模具锥度不足而形成表面形状缺陷，以及由于热应力而形成裂纹。

The project work will develop applied mathematical models to simulate two-dimensional heat flow and stress development in a static-cast ingot using finite-element modeling of transient thermal-stress development in solidification. The intent is to continue the application of mathematical models, industrial experimentation, and metallurgical studies to increase understanding and solve problems in other metal casting processes. While still incomplete, these models have already helped to improve understanding of fluid flow from submerged nozzles, the distorted shape of a continuous slab casting mold, the mechanical behavior of steel at elevated temperatures, the problems in casting of high-quality steel, such as inclusion entrainment and shell thinning due to shell jet impingement on the solidifying steel shell, formation of surface shape defects in stainless steel slabs due to inadequate mold taper, and crack formation due to thermal stresses.