连铸圆坯凝固微观组织数值模拟

Numerical Simulation of Solidification Microstructure During Continuous Casting Round Bloom

在连铸和随后的生产工艺中预测和控制钢材的微观结构是生产制造满足高质量要求的特殊钢的一项非常重要的任务。连铸过程是一个非常复杂的过程,在这一过程中伴随着热量传输、质量传输、凝固和相变。在CAFE模型中,元胞自动机方法与连铸过程中传热计算进行耦合。利用ProCAST软件对连铸圆坯的凝固过程进行仿真模拟,通过连铸坯温度测量证明预测的连铸坯表面温度与实际比较接近。应用CAFE法实现了连铸坯凝固过程三维微观组织及其形成过程的模拟,通过对比试验和模拟的圆坯的宏观结构对模拟的结果进行了评价,证明模拟结果与试验结果吻合。

Prediction and control of steel microstructure during and after the continuous casting process is an extreme- ly important task for steel producers to make special steels with high quanlity. Continuous casting is a very complex process with series of parallel phenomena of heat and mass transfer, solidification and phase transformations. In the CAFE model, the cellular automation method was combined with heat transfer calculation during the continuous casting process. Simulations of solidification process of continuous cast round bloom were carried out with ProCAST software, and the simulation results are consistent with the measure surface temperature of continuous casting round bloom. Base on the CAFE method, 3D-microstructure of continuous casting round was simulated during solidification process, and simulation results were evaluated from comparison between experimentally observed and simulated maerostructures of the round bloom. It was proved that the simulation result was consistent with industy experiment result.