含能材料2019，Vol.27Issue(5)：363-370,8.
TNT熔铸炸药内部结晶组织的数值模拟
Numerical Simulation of the Internal Crystalline Structure of TNT Melt?Cast Explosive
刘雨荻 1曹红松 1刘胜 1张亨 1张晓东 1谢峰1
作者信息
摘要
Abstract
In order to investigate the micro?crystalline structural morphology in Melt?cast explosive and improve the quality of explosive column, the CAFE module of ProCAST casting simulation software was used to simulate the internal crystalline structure of TNT melt?cast explosive. Using cellular automata in CAFE module, the shape and size of grain in column under different technological conditions and TNT nucleation parameters were predicted. The improvement measures of grain refinement process were obtained by adjusting the nucleation undercooling degree, pouring temperature and cooling rate of melt. The results show that with the decrease of melt nucleation undercooling, the equiaxed grain area in the column gradually increases, and the average grain size decreases to 458.5 μm from 715.5 μm; with the decrease of melt surface nucleation undercooling, the grain morphology inside the column does not change significantly, and the average grain size increases to 719.2 μm from 715.5 μm; with the decrease of melt pouring temperature, the equiaxed grain area in the column gradually increases, and the average grain size decreases to 729.2 μm from 1114.5 μm; with the decrease of cooling rate, the central equiaxed grain area gradually enlarges, the outer equiaxed grain area gradually disappears, and the average grain size increases to 1149.1 μm from 719.4 μm. After process optimization, the column is composed of fine equiaxed grains with an average grain size of 516.9 μm, the size distribution is concentrated, and the micro?quality of the grain is greatly improved.关键词
熔铸炸药/ 数值模拟/ 元胞自动机（CA）/ 结晶组织/ Key words
melt‑cast explosive/ numerical simulation/ cellular automation(CA)/ crystalline structure/ 引用本文复制引用
刘雨荻,曹红松,刘胜,张亨,张晓东,谢峰..TNT熔铸炸药内部结晶组织的数值模拟[J].含能材料,2019,27(5):363-370,8.
