大型钢锭凝固数值模拟与试验研究  

Solidification Simulation and Experimental Investigation of Heavy Steel Ingot

作　　者：桑宝光[1] 张秀伟 康秀红[1] 夏立军[1] 李殿中[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,辽宁沈阳110016 [2]内蒙古北方重工业集团有限公司特殊钢厂,内蒙古包头014033

出　　处：《铸造》2010年第3期276-279,共4页Foundry

基　　金：高档数控机床与基础制作装备(2009ZX04014-081)

摘　　要：利用Procast软件包对6t钢锭的凝固过程进行了计算机模拟,并预测了钢锭的缩孔疏松分布,计算结果发现原有工艺中钢锭的缩孔深度大,轴线疏松严重。将模拟结果与试验结果进行对比,两者吻合良好。在此基础上,研究了绝热板和发热剂对钢锭的缩孔疏松分布的影响,优化了绝热板工艺。模拟与试验结果表明,优化后的绝热板加发热剂工艺可显著改善钢锭冒口的保温效果,减小缩孔深度,提高钢锭的质量和利用率。In the present study, the solidification process of a 6 t steel ingot was simulated with Procast software. After finite element analysis, the positions of shrinkage cavity were determined. Simulation results show that there are deep shrinkage cavity and severe central porosity in the ingot with original adiabatic board. The predicted shape and depth of the shrinkage cavity at the top are compared to the experimental results, and good agreement was obtained. Based on the validated simulation conditions foregoing, the effect of the adiabatic board and exothermic compound on the depth of shrinkage cavity and the distribution of central porosity in the ingot was investigated. The simulated and experimental results show that the depth of shrinkage cavity and the severity of central porosity in the ingot were greatly reduced when the optimized adiabatic board with exothermic compound was used.

关 键 词：大型钢锭 数值模拟 绝热板 缩松 

分 类 号：TG260[金属学及工艺—铸造]