Numerical Simulation of Filling Process of Semi-solid A356 Aluminum Alloy in Rheo-diecasting Process

Bai Yuelong1; Mao Weimin1; Xu Hong3; Hou Hua3; Mao Hongkui3; Xu Jun2

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Numerical Simulation of Filling Process of Semi-solid A356 Aluminum Alloy in Rheo-diecasting Process
Issue 6, Pages: 428-431(2008)
Published： 2008 ，
DOI：

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[1]白月龙,毛卫民,徐宏,侯华,毛红奎,徐俊.半固态A356铝合金流变压铸充填过程的数值模拟[J].特种铸造及有色合金,2008(06):428-431+406.

Bai Yuelong1, Mao Weimin1, Xu Hong3, et al. Numerical Simulation of Filling Process of Semi-solid A356 Aluminum Alloy in Rheo-diecasting Process. [J]. Special Casting & Nonferrous Alloys (6):428-431(2008)
[1]白月龙,毛卫民,徐宏,侯华,毛红奎,徐俊.半固态A356铝合金流变压铸充填过程的数值模拟[J].特种铸造及有色合金,2008(06):428-431+406. DOI：

Bai Yuelong1, Mao Weimin1, Xu Hong3, et al. Numerical Simulation of Filling Process of Semi-solid A356 Aluminum Alloy in Rheo-diecasting Process. [J]. Special Casting & Nonferrous Alloys (6):428-431(2008) DOI：

摘要

建立了半固态A356铝合金浆料的表观粘度触变模型

模拟了米字型压铸件的流变充填过程

并进行了实际流变充填验证。验证性的流变压铸表明

所建立的表观粘度触变模型正确可行

可用来模拟半固态A356铝合金浆料的流变压铸充填过程。数值模拟还表明

压射比压、内浇道浆料的流动速度和浆料温度对半固态A356铝合金的流变压铸充填过程具有重要影响。较大的压射比压、内浇道浆料的流动速度和浆料温度有利于流变充填;流变压铸的内浇道尺寸对半固态A356铝合金的流变压铸充填过程具有重要影响

较大的内浇道尺寸有利于流变充填

对于米字型压铸件而言

合适的压铸工艺参数为:压射比压不小于30MPa

内浇道的流动速度不小于3.00m/s

浆料温度在595℃以上。

Abstract

An apparent viscosity model for the semi-solid A356 aluminum alloy has been established to simulate the filling process in the rheo-diecasting

and experimental validation of the rheo-diecasting has been carried out.The simulated results are well in agreement with experimental ones

showing the availability of the model.The results indicate that the filling of semi-solid A356 aluminum alloy in the rheo-diecasting is closely dependent on the injection pressure

the flow velocity of the slurry at the ingate and the forming temperature.The higher injection pressure and higher flow velocity as well as the higher forming temperature are helpful to the filling of the slurry.In addition

the larger size of ingate is beneficial for the filling of the slurry also.The desirable filling process can be obtained with injection pressure more than 30 MPa at filling velocity of 3.00m/s and pouring at more than 595 ℃.