摘要
应用作者建立的合金凝固三传统一数学模型和数值计算方法,在IBM PC个人计算机上,进行了AL一Cu合金铸锭在水平定向凝固过程中的温度、凝固进程、成分、压力和液相流场变化的数值模拟;进行了大高/长比Al—2%Cu铸锭的水平定向凝固实验。理论计算结果与实验测得的铸锭凝固温度场变化及宏观成分分布均吻合得很好。数值模拟及实验结果都显示出大高/长比水平定向凝固铸锭在水平方向和垂直方向上均存在宏观成分偏析。
Abstract
A continuum model for computer simulation of heat,mass and momentum transfers during casting solidification and the relevant numerical solution techniques, developed by authors,have been used to numerically simulate the temperature,composition,pressure and liquid flow velocity fields in horizontal directional solidification processes of Al-Cu alloy ingots. The experiment of horizontal directional solidification with a large height/length ratio ingot of Al-2%Cu alloy was conducted,the computed values of several cooling curves and micro-composition distributions in the solidified ingot reasonably agree well with the experimental values. Both the computed and experimental results reveal the existence of micro-segregations in both horizontal and vertical directions in the solidified Al-2%Cu alloy ingot.
出处
《铸造》
CAS
CSCD
北大核心
1992年第10期1-6,共6页
Foundry
基金
国家自然科学基金资助课题
