Abstract
To strengthen the bottom cooling is one of the key technologies of directionally solidified ingot process. Stool cooling scheme has a significant impact on the solidification process of the ingot. The study optimizes chassis cooling scheme according to the air gap between the ingot and the stool. With multiple sets of cooling system, water-cooled stool makes the basal water cooling adapt to air gap distribution through subregional cooling of different intensity control, and be uniform with it in the longitudinal direction solidification. The paper establishes mathematical model of unidirectional solidified ingot on temperature field of conventional water-cooled stool and improved one respectively. By the aid of finite element analysis method, numerical simulation of 45t ingot with algebraic model is carried out. In order to optimize parameters of ingot unidirectional solidification, temperature fields influenced by conventional water-cooled stool and improved one in the process of unidirectional solidification are simulated. The numerical results show that the optimized chassis cooling can result in the ingot in a longitudinal uniform solidification. The numerical simulation results can provide important reference for the optimization of unidirectional solidification process.
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