The continuous casting of steel and related processes are being investigated by the Continuous Casting Center at the Colorado School of Mines. The objectives are to develop accurate computational models, validate them with both laboratory and plant experiments, and apply them to improve understanding and solve problems of practical interest to the steel industry. Example projects include the formation of oscillation-marks and defects at the meniscus, the behavior of argon gas flow in the nozzle and mold, and crack formation during solidification. 1) Computational models of turbulent flow in then nozzle and liquid pool are applied to predict the formation, transport and entrapment of bubbles into the solidifying interface. 2) The formation of oscillation marks is being simulated using coupled thermal-flow models of the flux rim, slag layers, and solidifying steel in the meniscus region. The results reveal the mechanism of hooks, oscillation marks, and surface defects, involving meniscus overflow and thermal stress. 3) Cracks form in the solidifying steel at the solidification front when the shell is subjected to tensile stress. Thermal-mechanical models including temperature-, phase-, and strain-rate dependent properties are being applied to predict stress development and cracks for different taper designs.
About the Speaker
Brian G. Thomas
Professor, Colorado School of Mines
Mechanical Engineering Dept.
Dr. Brian G. Thomas is Professor of Mechanical Engineering at the Colorado School of Mines, and Director of the Continuous Casting Center. His research efforts focus on computational modeling of continuous casting of steel and related processes. He received his Bachelors of Metallurgical Engineering from McGill University, (Montreal, Canada) in 1979 and Ph.D. in Metallurgical Engineering in 1985 from the University of British Columbia, Canada. He has worked in the Research Departments of Algoma Steel, Sault Ste. Marie, Canada and BHP in Melbourne, Australia. Dr. Thomas has coauthored over 400 papers, and been recognized with several awards: Presidential Young Investigator Award from NSF, Outstanding Young Manufacturing Engineer Award from SME, Xerox Award from UIUC, Distinguished Scientist and Application to Practice Awards from TMS, Baosteel Honorary Professor, HPC Innovation Award, Fellow of ASM International, Distinguished Member and Fellow of AIST, and 14 best paper awards (from AFS, AIME, ISS, AIST, TMS, CIM, and ASM International). He has given over 200 presentations worldwide and co-instructed many short courses to industry, including the annual Brimacombe Continuous Casting Course.