关键词: 连铸板坯, 缩孔, 有限元模型, 数值模拟

Abstract: In the production process of continuous casting slabs, there are often a large number of shrinkage holes inside the casting blanks. The spherical shrinkage pores are the most typical, shrinkage holes lead to internal defects, and the quality of the slabs is severely reduced. Therefore, the three-dimensional finite element model used in this paper was used to simulate the behavior of the shrinkage cavity during slab rolling, and the accuracy of the model simulation was verified by experiments. The results show that the three-dimensional finite element simulation results agree well with the experimental results, and the model can correctly predict the closing behavior of shrinkage pores during hot rolling. During the rolling process, the evolution characteristics of the spherical craters of different diameters are almost the same, and the closing process of the spherical craters with a large diameter is relatively fast; the farther the craters of the same diameter are away from the centerline of the thickness of the ties, the more distance from the surface of the cast slab. Nearly, the easier it is to close, the relative position in the rolling stock during closing of the shrinkage hole does not change.

Key words: continuous casting slab;shrinkage hole, finite element model, numerical simulation