科研之友
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摘要
Development of the mathematical model of macrosegregation and stress-strain state formation in ingot produced by continuous casting (CC) with mechanical soft reduction is the main goal of this paper.
The numerical solution of this process is based on the finite element method with the developed mathematical model of the soft reduction (SR). This model of the SR in the cast slabs in semi-solid state takes into account the processes of crystallization, thermal volume changes, diffusion, macrosegregation and mechanical deformation of the ingot. A new model of macro segregation formation in the slab during continuous casting with the mechanical soft reduction is proposed here. This concept is based on the simulations of the displacement of the liquid phase by soft reduction that takes into account the equivalent artificial compressibility of the liquid phase in the cross section of cast slabs.
During the simulation the technical features of the continuous casting machine are taken into account, namely location and parameters of rolls, spray nozzles and cristallizator. The casting process of 300x400 mm St3S steel ingot is selected as a case study in the present work.
The influence of the localization of mechanical soft reduction on macrosegregation and stress-strain state formation in the cast slab is investigated. The conclusions regarding mentioned influence are presented and discussed.
- 出版日期2008
