文档介绍：第 20 卷第 7 期中国有色金属学报 2010 年 7 月
The Chinese Journal of Nonferrous Metals July 2010
文章编号:1004-0609(2010)07-1260-07

镁基复合材料半固态压铸过程的数值模拟

胡勇 1,何柏林 1,闫洪 2

(1. 华东交通大学载运工具与装备教育部重点实验室,南昌 330013;
,南昌 330031)

摘要:对镁基复合材料半固态充型凝固过程进行数值模拟,并进行半固态流变成形实验。结果表明,在液态充
型过程中,压力变化非常紊乱;而在固态充型过程中,压力在推进方向上逐渐降低,这将产生有利于充型的背压。
凝固过程的固相体积分数变化表明:在半固态充型条件下,整个铸件基本上是同时凝固,从而可有效地避免在液
态充型时产生缩孔缩松。实验结果与模拟结果吻合,半固态流变成形件的质量优于液态成形件的质量。
关键词:镁基复合材料;半固态,复合材料,数值模拟
中图分类号:TB331 文献标志码:A

Numerical simulation of semi-solid die casting process of
magnesium posite

HU Yong1, HE Bo-lin1, YAN Hong2

(1. Key Laboratory of Ministry of Education for Conveyance and Equipment,
East China Jiaotong University, Nanchang 330013, China;
2. School of Mechanical-Electrical Engineering, Nanchang University, Nanchang 330031, China)

Abstract: The semi-solid filling and solidification process of posite was simulated and the semi-sold
filling experiment was carried out. The results indicate that the distribution of pressure during the liquid filling process is
inordinate, but the pressure reduces gradually in the filling direction during the semi-solid filling process, which is
favorable to generate back pressure during filling process. According to the distribution of the solid volume fraction
during the solidification, it is found that the castin