Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第20卷    第7期    总第136期    2010年7月

[PDF全文下载]    [Flash在线阅读]    

    

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;
2.南昌大学 机电工程学院,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

Numerical simulation of semi-solid die casting process of
magnesium matrix composite
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 magnesium composite 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 casting solidifies at the same time during the semi-solid filling, which can reduce shrinkage cavity and porosity. And the simulation results are in accordance with the experimental results. The quality of semi-solid reho-forming casting is better than that of liquid forming casting.

 

Key words: Mg matrix composite; semi-solid; composite; numerical simulation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com