Abstract
AbstractA coupled thermo‐mechanical model has been established including the finite difference method (FDM) simulating the mould heat transfer based on the inverse problem algorithm from measured temperatures, and the finite element method (FEM) predicting the strand stress. Calculation results show that the distribution of mould heat flux, which determines the shell thickness, corresponds to that of thermal resistance between the mould and shell. The safety index of billet quality illustrates that the surface cracks are likely to originate near the meniscus and propagate from beneath the surface at the lower part of mould. In this study, the thickness distributions of liquid and solid slag films are also calculated, showing that the heat transfer is determined mainly by the solid slag film in the upper mould.
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