Abstract: In order to improve the internal quality of E36 steel slab in a steel plant, a mathematical model of the solidification process of E36 steel slab is established through ProCAST software, and on this basis, the CAFE module is used to simulate the solidification structure of 300 mm x 2 070 mm the cast slab with the superheat 10 ~ 25 ℃., casting speed 0. 70 ~ 0. 85 m/min and secondary cooling ratio 0. 30 ~ 0. 39 L/kg different process parameters as well as adding EMS are studied. From the simulation results, it can be seen that for every 10 ℃. increase in superheat, the proportion of equiaxed crystal regions decreases by 3%. As the degree of superheat increases, columnar crystal regions increase, equiaxed crystal regions decrease. The installation of electromagnetic stirring in the second cold zone increases the equiaxed crystal zone and reduces the average crystal grain radius. According to the simulation results, the process is optimized, and the superheat is reduced from 15 to 10 ℃. By comparing the low magnification structure of the cast slab before and after the optimization, it can be seen that the equiaxed crystal zone of the cast slab is significantly enlarged, and the center segregation is effectively improved.

摘要： 为改善钢厂E36钢板坯内部质量,通过ProCAST软件建立E36钢板坯凝固过程数学模型,并在此基础上采用CAFE模块对研究过热度(10~25℃)、拉速(0.70-0.85 m/min)和二冷比水量(0.30~0.39 L/kg)等不同连铸工艺参数以及加入电磁搅拌的300 mm ×2 070 mm铸坯凝固组织进行模拟。从模拟的结果可知,过热度每增加10℃,等轴晶区比例减少3%,随着过热度的增加,柱状晶区增大,等轴晶区减少。在二冷区安装电磁搅拌使等轴晶区增加,平均晶粒半径减小。根据模拟结果进行工艺优化,将过热度由15℃降到10℃。通过对比优化前后铸坯低倍组织,可以看出铸坯等轴晶区明显增大,中心偏析得到有效改善。

关键词: E36船板钢, 板坯, 凝固组织, 数值模拟, 过热度