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利用ABAQUS有限元软件对半无头轧制超长铸坯均热过程中的温度场变化进行了数值模拟。在建模过程中,利用ABAQUS的用户子程序USDFLD和FILM,采用改变材料导热系数和与环境的综合换热系数的方法,模拟了铸坯进入均热炉的过程,使模型的计算量大幅减小,计算结果与现场实测数据吻合较好。计算了拉坯速度分别为4、5和6 m/min时,长40、80、120和160 m铸坯的温度场变化,发现在拉坯速度为4 m/min时,铸坯尾部入炉15 min后,4种长度铸坯的纵向温差均可控制在30℃以内;提高连铸机的拉坯速度可以使铸坯均热所需的时间明显缩短。
The ABAQUS finite element software was used to numerically simulate the temperature field in the soaking process of the semi-endless rolling super-long slab. In the modeling process, ABAQUS user subroutines USDFLD and FILM were used to simulate the process of slab entering the soaking furnace by using the method of changing the material thermal conductivity and the integrated heat transfer coefficient with the environment, which greatly reduced the calculation of the model Small, the calculated results are in good agreement with the field measured data. The change of temperature field of cast billets 40, 80, 120 and 160 m was calculated at the casting speed of 4, 5 and 6 m / min respectively. It was found that when the casting speed was 4 m / min, After 15 min, the longitudinal temperature difference of the four kinds of slab can be controlled within 30 ℃; to improve the slab casting speed can make the billet soaking time significantly shorter.