北京科技大学学报2011，Vol.33Issue(9)：1091-1098,8.
对22CrMoH连铸坯微观组织及合金元素影响的数值模拟
Numerical simulation of the microstructure of 22CrMoH billets and the effects of alloying elements
摘要
Abstract
The temperature filed of 22CrMoH billets in continuous casting was simulated by using a moving boundary method. Based on a CAFE （cellular automaton-finite element analysis） approach, the microstructure of 22CrMoH billets was obtained and it agrees reasonably well with experimental data. The effects of alloying elements such as Cr, Mo, Si and Mn on the microstructure of 22CrMoH billets were studied. The results suggested that within the specified scope of the 22CrMoH grade, with the contents of Si and Mn increasing, the proportion of equiaxed grains increased, and the number of grains raised, hence the average radius reduced. The increased content of Mo tends to enhance the formation of nuclei, and a proper decrease of Cr element is conducive to raise the ratio of equiaxed grains while has little influence on the number and average radius of grains. Finally, the contents of Cr, Mo, Si and Mn in 22CrMoH steel was optimized, and the simulated results show that the microstructure of 22CrMoH billets is greatly improved： the proportion of equiaxed grains becomes near double, the number of grains increases by 19.96% , and the average grain radius decreases by 9.20%.关键词
齿轮钢/合金元素/连铸坯/微观组织/数值方法/计算机模拟Key words
gear steels/alloying elements/billets/microstructure/numerical methods/computer simulation分类
矿业与冶金引用本文复制引用
白李国,刘海英,张延玲,缪新德,阮小江..对22CrMoH连铸坯微观组织及合金元素影响的数值模拟[J].北京科技大学学报,2011,33(9):1091-1098,8.基金项目
中国博士后基金资助项目 （）
