Inherited Stress Analysis About Billet Shell

Mathematical simulation has been widely applied to continuous casting. Analysis of heat transfer and stress of billet optimizes the process of continuous casting and also improves quality of billet. The study on heat transfer and stress of billet are based on large scales finite element software ANSYS. Non-steady-state temperature field is established by two-dimensional slice Act. And the genetic analysis of billet stress which is based on genetic behavior of billet shell stress is established by initial stress method provided by ANASYS. Elastic-plastic stress is studied based on thermal analysis with the thermal indirect coupling method.Based on method of inherited stress analysis, the deformation behavior of billet shell within mold is analyzed, and it is compared with traditional method. The results show that: in the same process conditions, distribution of billet shell stress is similar. The stress value with genetic stress model is higher than that with traditional model in the same region. Displacement of the two methods also exist differences, in particular, the deviations of displacement in shell corner are large. The result in billet corner with genetic analysis is more reasonable than the result of traditional method.The simulating range of pouring temperature is 1530~1540℃, the range of casting speed is 1.5~2.5m·min-1. The result shows that: the influence of pouring temperature on mold thermal flux density, shell growth, displacement and equivalent stress of billet shell is little. As the casting speed is increasing, the mold thermal flux density increases, the thickness of solidified shell decreases, shell displacement and equivalent stress also decrease.