摘要
实测了不同抽拉速度单晶高温合金定向凝固过程的初始条件、边界条件及温度场，建立了数值模拟系统的实体模型，采用ＰｒｏＣＡＳＴ有限元模拟软件包计算了不同抽拉速度单晶合金试板的定向凝固过程温度场。结果表明：模拟结果与实测结果吻合良好，在１０００℃以上计算温度曲线与实测温度曲线相比误差小于５％；随着抽拉速度的增加，凝固速度提高，向下凹的液相线的曲率变大；采用数值模拟可为单晶合金定向凝固工艺的优化提供一种有效的手段。
The thermal fields of the directional solidification of single crystal superalloys have been measured at various withdrawal rates The entity model of a simulated system has been built and thermal fields have been calculated with ProCAST software The results show that the discrepancy between the measured temperature data and the calculated temperature data is lower than 5% at three different withdrawal rates above 1000, the curvatures of the liquid lines are increasing with withdrawal rates increment The numerical simulation of the directional solidification of single crystal superalloys can provide an available tool for optimizing solidification process
出处
《材料工程》
EI
CAS
CSCD
北大核心
1999年第7期40-42,共3页
Journal of Materials Engineering
关键词
单晶
高温合金
抽拉速度
数值模拟
定向凝固
single crystal superalloys
withdrawal rate
thermal fields
numerical simulation
