铸造技术2016，Vol.37Issue(9)：1807-1811,5.DOI:10.16410/j.issn1000-8365.2016.09.002
基于CAFE模型研究过冷度/形核数对H13钢微观组织的影响
Study on Effect of Supercooling Degree and Nucleation Number on Microstructure of H13 Steel Based on CAFE Model
摘要
Abstract
The solidification process of H13 steel was simulated based on CAFE model.The solidification microstructure simulation model coupled with macro-temperature field,concentration field and micro growth process was established based on cellular automaton model.The effect of supercooling degree and nucleation number on solidification microstructure was investigated using established microstructure model.The results show that when the supercooling degree is 0.1～5 ℃,the grain area is mainly middle zone equiaxed grain,the columnar grain zone occupies less area,and the growth trend is controlled by equiaxed grain.When the undercooling is 5～7 ℃,columnar grain growth rate increases,possession ratio increases,but the internal microstructure of middle equiaxed grain coarsens,the shape factor increases,the grain size and grain size variation show the first increasing and then decreasing.However,the undercooling reach 7～15 ℃,the growth of columnar crystals is controlled by internal equiaxed grain,and with the increase of undercooling degree,the grain size is refined.In addition,the nucleation number increase,columnar grain zone reduce,the equiaxed zone increase,while the grain size first increase and then degrease.关键词
H13钢/CAFE/过冷度/形核数Key words
H13/CAFE/supercooling degree/nucleation number分类
矿业与冶金引用本文复制引用
邓力群,邹树梁,唐德文,谢宇鹏,张德,袁联雄..基于CAFE模型研究过冷度/形核数对H13钢微观组织的影响[J].铸造技术,2016,37(9):1807-1811,5.基金项目
湖南省科技重大专项资助项目(2012FJ1007) （2012FJ1007）
湖南省自然科学省市联合基金资助项目(S2015J512J) （S2015J512J）
