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健全铸件的获得在很大程度上取决于凝固过程的预测和控制,由于铸件的凝固是在铸型内进行而难以直接观察,所以长期以来主要以经验或实测资料作为依据来控制凝固过程。大型电子计算机技术和各种数值计算法的迅速发展给铸件凝固过程的模拟计算提供了条件。本文在2t空心钢锭凝固过程热模拟实验的同时,进行了数学模拟。计算结果表明,数学模拟数据合理、准确、可靠,能正确反映空心锭的实际凝固过程。在此基础上,本文对空心锭的温度分布、凝固前沿、凝固参数、二次枝晶臂距以及成分偏析也进行了数学模拟,并取得了满意的结果,为空心锭的实际生产打下了基础。
The availability of sound castings largely depends on the prediction and control of the solidification process. Since the solidification of the castings is difficult to observe directly in the mold, the solidification process has long been dominated mainly by empirical or measured data. The rapid development of large-scale computer technology and various numerical calculation methods has provided the conditions for the simulation calculation of the solidification process of castings. In this paper, 2t hollow ingot solidification thermal simulation experiments at the same time, the mathematical simulation. The calculation results show that the mathematical simulation data is reasonable, accurate and reliable, which can correctly reflect the actual solidification process of hollow ingot. On this basis, the temperature distribution, solidification front, solidification parameters, secondary dendrite arm spacing and segregation of hollow dendrites are also mathematically simulated, and satisfactory results are obtained, laying a foundation for the actual production of hollow ingots .