| 铸钢件缩孔缩松形成过程的数值模拟 |
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| 引用本文： | 程军,柳百成.铸钢件缩孔缩松形成过程的数值模拟[J].清华大学学报(自然科学版),1991(2). |
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| 作者姓名： | 程军 柳百成 |
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| 作者单位： | 机械工程系
(程军)，机械工程系(柳百成) |
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| 摘 要： | 提出了预测铸钢件中缩松缺陷的数值方法，考虑了传热、枝晶间液相流动和气体析出等因素。计算和实浇了三个不同直径的圆柱形铸钢件，计算结果与实验结果基本一致。还提出了预测铸钢件编松的新判ＧＦ／ＲＦ ＧＦ／ＲＦ（ＧＦ为临界固相率梯度， ＲＦ为临界固相率推进速度），并在生产中得到了应用。
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| 关 键 词： | 凝固过程 数值模拟 缩孔缩松 铸钢件 |
Numerical Simulation of the Formation Process of Shrinkage Cavity and Porosity in Steel Casting |
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| Chen Jun,Liu Baicheng.Numerical Simulation of the Formation Process of Shrinkage Cavity and Porosity in Steel Casting[J].Journal of Tsinghua University(Science and Technology),1991(2). |
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| Authors: | Chen Jun Liu Baicheng |
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| Institution: | Department of Mechanical Engineering |
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| Abstract: | A numerical analysis method is presented to simulate the shrinkage porosity formation in steel castings on the basis of heat flow, interdendritic fluid flow and possible evolution of dissolved gases. Three cylindrical steel castings with different diameters were cast to study the shapes of shrinkage cavity and porosity, and the calculated results match the experiments quite well. In addition, a new criteria GF/RF (GF-critical solid fraction ratio gradient,RF-critical solid fraction rate) is proposed for shrinkage porosity prediction and has been used in foundry industry. |
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| Keywords: | solidification process numerical simulation shrinkage cavity and porosity steel casting |
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