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| 1 | Numerical simulation and experimental investigation of two filling methods in vertical centrifugal casting显示文摘A mathematical model of the centrifugal filling process was established. The calculated results show that the centrifugal field has an important influence on the filling process. Moreover, the process of liquid flow and the location of free surface in sprue were simulated based on the Solution Algorithm-Volume of Fraction (SOLA-VOF) technique. In order to verify the mathematical model and computational results, hydraulic simulation experiment was carried out. The results of experiments and numerical simulation indicate the accuracy of mathematical model. Two kinds of filling methods were investigated and the results show that the bottom filling is better than the top filling that can achieve stable filling and reduce defects. | 吴士平 历长云 郭景杰 苏彦庆 雷修桥 傅恒志 | 2006 | 中国有色金属学会会刊:英文版2006，16，5： | 9 |
| 2 | 钛合金铸件精密成形理论与技术研究进展显示文摘由于航空、航天用零部件对材料比强度有很高的要求,因此钛合金作为一种高比强合金在航空、航天领域的应用越来越多,而且这类零部件常采用薄壁复杂结构。若采用水冷坩埚方式熔炼钛合金,会导致钛合金熔体流动性差,因此,离心铸造方法已成为钛合金薄壁复杂铸件精密成形的主要方法。介绍了离心场下钛合金铸件精密铸造成形理论及技术的发展过程,在此基础上总结了离心场下钛合金熔体的充型、凝固行为及铸件缺陷形成规律,提出了立式离心铸造技术改进方案,并对未来离心场下成型理论与技术的发展提出了展望。 | 吴士平 郭景杰 张军 傅恒志 | 2011 | 中国材料进展2011，30，7： | 5 |
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