| 阀座挤压铸造计算机数值模拟 |
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| 引用本文： | 王迎春,谢敏,赵诚,李大永,彭颖红.阀座挤压铸造计算机数值模拟[J].铸造,2005,54(7):698-701. |
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| 作者姓名： | 王迎春 谢敏 赵诚 李大永 彭颖红 |
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| 作者单位： | 1. 上海交通大学机械与动力工程学院知识工程研究所,上海,200030
2. 上海交通大学轻合金精密成型国家工程研究中心,上海,200030 |
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| 摘 要： | 基于有限差分法建立了三维热流模型,对铝合金阀座挤压铸造过程进行数值模拟,研究了填充和凝固过程中温度场、流场以及液体分数等主要参数的分布情况,为优化阀座挤压铸造的流场和工艺参数提供理论依据.同时,预测和分析了在实际生产过程中出现的气孔和缩孔缺陷,发现通过降低浇注速度可有效地抑制因合金液的剧烈运动而引起的气孔缺陷.
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| 关 键 词： | 挤压铸造 阀座、流场、数值模拟 |
| 文章编号： | 1001-4977(2005)07-0698-04 |
| 修稿时间： | 2004年11月1日 |
Numerical Simulation of Squeeze Casting of Valve Seat |
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| WANG Ying-chun,XIE Min,ZHAO Cheng,Li Da-Yong,PENG Ying-hong.Numerical Simulation of Squeeze Casting of Valve Seat[J].Foundry,2005,54(7):698-701. |
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| Authors: | WANG Ying-chun XIE Min ZHAO Cheng Li Da-Yong PENG Ying-hong |
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| Abstract: | The finite difference method was utilized to establish the heat flow model, and simulates the squeeze casting process of aluminum valve seat Through calculation of temperature and velocity field during the filling and solidification stages, the evolution of temperature distribution and liquid fraction was analyzed. Then, the defects generated in manufacture were forecasted and analyzed Furthermore, through reducing the pouring velocity, the gas holes generated by the severe movement of the alloy liquid could beeliminated effectively. |
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| Keywords: | squeeze casting valve seat flow field numerical simulation |
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