基于ProCAST的大尺寸空心定向叶片数值模拟
Numerical Simulation of Large-scale Hollow Directional Blade Based on ProCAST
李杨 1房雨萌 2代淑荣 2刘蓓蕾 2吴保平 1吴剑涛 1李俊涛1
作者信息
- 1. 北京钢研高纳科技股份有限公司,北京 100081
- 2. 河北钢研德凯科技有限公司,涿州 072750
- 折叠
摘要
采用ProCAST软件研究了DZ409合金大尺寸空心定向叶片精密铸造过程的温度场,分析了固液界面前沿的变化,研究了定向凝固过程中浇注温度、型壳温度、拉晶速率对温度场、凝固参数、应力场的影响,并通过G(温度梯度)/R(凝固速率)分析优选工艺模拟凝固组织.结果显示,当浇注温度和模具温度均为1 560℃时,铸件不同位置的温度梯度与G/R值较大,有利于定向凝固柱状晶的生长.低拉晶速率可以获得较大的温度梯度、G/R值,有利于定向柱状晶粒生长.通过选择合适的浇注温度和拉晶速率,可显著改善叶身的晶粒取向.对模拟得到的较优工艺进行试验验证,发现晶粒取向与模拟结果一致.
Abstract
The temperature field of large-size hollow directional blade of DZ409 alloy during investment casting pro-cess was investigated by the ProCAST software,and the variation of the front edge of solid-liquid interface was ana-lyzed.Effects of pouring temperature,shell temperature and drawing rate on temperature field,solidification param-eters and stress field during directional solidification were explored,and the solidification structure was simulated by G/R analysis.The results indicate that with the pouring temperature of 1 560℃and mold temperature of 1 560℃,the temperature gradient and G/R value of the casting are larger at different positions,which is conducive to the growth of directional solidification columnar crystal.Low drawing rate can lead to large temperature gradient and G/R value,which is conducive to the growth of directional columnar grain.The grain orientation of the leaf can be significantly improved by selecting suitable pouring temperature and drawing rate.The optimum process obtained by simulation was verified,and the grain orientation results are in consistent with the simulated ones.
关键词
定向叶片/ProCAST/精密铸造Key words
Directional Blade/ProCAST/Investment Casting引用本文复制引用
基金项目
国家科技重大专项资助项目(HT-J2019-VI-0020-0136)
出版年
2024
NETL
NSTL
万方数据