Taper Study Of Supercolossal Bloom Continuous Casting Mold

With the development of modern industry, infrastructure needs of largecross-sectional dimensions of steel. In the continuous casting process, moldas the core of the continuous casting machine, is very important forespecially large billet continuous casting, taper is one of the most importantdesign parameters of mold, the rational design of taper is directly related tothe life of the mold and slab quality. The appropriate taper not only canimprove the effect of mold, reduce the occurrence of steel-leakage accident,but also help to prevent and reduce the vertical slab crack.In the past, design of the mold taper relied mainly on the contractivelaw of slab. With finite element analysis software ANSYS, this paper, on theone hand, simulate the shrinkage of the slab in the mold0f700mm×700mmbillet, on the other hand, simulate the deformation of the mold by the methodof numerical simulation, and get the taper of the mold by integrating theshrinkage of the slab and the deformation of the mold to provide a certainreference for the in-depth study of large square billet mold technology.Firstly, a2D non-steady-state thermal-mechanical coupled model is employed to simulate the solidification shrinkage process of the slab in themold with different casting speeds by using two-dimensional slice method,and the temperature distribution of the slab, solidified shell growth situationand slab contraction condition are seen as the basic date of the design of themold taper.Secondly, a3D steady-state finite-element model of the mold isemployed to simulate the temperature field of the mold with different castingspeeds, then, thermal element is converted into a structural element, adeformation model of the mold is employed to calculate the stressdistribution and total deformation of the mold.Finally, based on the casting shrinkage and the mould deformation, thetaper of the mold is designed with different casting speeds. The results showthat the copper mold can well adapt to the billet contraction by using threetaper in the middle and double taper at the corner.