摘要
本文通过计算机模拟镍基高温合金平板试样HRS定向凝固过程,建立了二维瞬态导热数学模型,并用此模型和以TP801B单板机为核心的控制系统,对镍基高温合金平板试样定向凝固过程中的固/液界面位置进行了实时控制,结果表明,受控试样的固/液界面位置能很快地趋于并稳定在隔热板附近。对界面位置的控制能有效地提高固/液界面前沿液体中的温度梯温及其稳定性,对合金的宏观和微观组织均有明显的改善。
In this paper, a two-dimensional transient thermal model of a plate sample is established by computer-modelling the HRS directional solidification process of Ni-base superalloys. Using the model, a control-system based on a single board computer Tp801B is built up to real time control the location of solid/liquid interface in HRS directional solidification process. The result shows that the solid/liquid interface of controled samples tends to insulating plate rapidly and locates near it steadily. Thus it is effective to increase and stabilize the temperature gradient in the liquid ahead of the solid/liquid interface, also improve the macro-and microstructure。
出处
《航空材料学报》
EI
CAS
CSCD
1989年第2期8-15,共8页
Journal of Aeronautical Materials
基金
航空科学基金
