Materials Processing Fundamentals: Steelmaking Process Modeling and Composites
Sponsored by: TMS Extraction and Processing Division, TMS: Process Technology and Modeling Committee
Program Organizers: Jonghyun Lee, Iowa State University; Guillaume Lambotte, Boston Metal; Samuel Wagstaff, Oculatus Consulting; Antoine Allanore, Massachusetts Institute of Technology; Fiseha Tesfaye, Metso Metals Oy, Åbo Akademi University
Thursday 8:30 AM
February 27, 2020
Room: 13
Location: San Diego Convention Ctr
Session Chair: Allie Anderson, Gopher Resource; Jonghyun Lee, Iowa State University
8:30 AM
Preliminary Research into the Effects of Electric Field & Current on Reactive Processing of Ni 3 Al-CNT Composites: Crystal Gama1; Kevin Yokota1; Raj Kumar Rachapudi1; Mohammed Shahid Islam1; Alberto Ricciulli1; Khaled Morsi1; 1SDSU
This presentation discusses preliminary experiments on the intrinsic effects of electric current and field during the self-propagating high temperature synthesis (SHS) of Ni 3 Al-carbon nanotube (CNT) composites from elemental powders. Specifically, the effects of process variables such as current and electric field on the developed microstructure, combustion temperature, wave velocity and activation energy are discussed.
8:50 AM Cancelled
Numerical Simulation of Heat Transfer Between Roller and Slab during Medium Thickness Slab Continuous Casting: Shuang Liu1; Mujun Long1; Pei Xu1; Pingmei Tang1; Dengfu Chen1; Huamei Duan1; 1Chongqing University
A three-dimensional mathematical model for transient heat transfer between the rotating roller and the moving medium thickness slab at the straightening zone was established. The model considers the coupling process of several physical fields, such as conduction heat transfer, radiation heat transfer, turbulent flow of the cooling water inside the roller, convective heat transfer and roller rotation. Temperature variation in the roller at the casting speed of 0.9m/min, 1.0m/min and 1.1m/min was simulated with the slab surface temperature of 1273K, 1323K and 1373K. Results showed that the maximum temperature on the circumferential roller surface increased with the increase of the slab temperature, but decreased with the increase of casting speed while the slab surface temperature remaining unchanged. The effects of diameter and location of water slot on the roller cooling were computed and analyzed, indicating that the increasing water slot diameter could effectively reduce the surface temperature of roller.
9:10 AM
Mathematical Modeling of Strip Slipping on Bridle Roll of Skin Pass Mill During Speed-up Process: Yongqiang Wang1; Yanglong LI1; Hui Wang1; Wei Guo1; Jie Wen1; Meng Yu1; 1Research Institute of Technology of Shougang Group Co., Ltd.
In order to study the mechanism of slipping problem between strip and bridle roll during speed-up process for the skin pass mill (SPM), a mathematical model of strip slipping on bridle roll of SPM is established and a quantitative index called “strip slip risk factor” is proposed. Based on this model, the influencing factors are analyzed including friction coefficient, tension difference, wrap angle, strip velocity, acceleration and so on. It is found that increasing the friction coefficient, decreasing the tension difference, decreasing the velocity and acceleration will decrease the strip slip risk. For the sake of solving the strip slipping problem on bridle roll of SPM during speed-up process found in the field, the corresponding optimization measures are put forward in the light of calculating results. After the optimization, the monthly slipping times of strip on bridle roll are obviously reduced.