Indirect Squeeze Casting Process of Aluminum Alloy Based on Response Surface Method

In order to study indirect squeeze casting process, ZL101 aluminum alloy was selected with porosity as indicators and the effects of process parameters of pressure, die temperature and proportionality factor on porosity were analyzed. Box-Behnken design of the experiment was developed to design response surface experiment and regression model of the relationship between the indirect squeeze casting process parameters and porosity was established. ANOVA result shows that the fitting effect between the experimental results and the mathematical model is good. The effect of die temperature and pressure on porosity has certain interaction; however, there is not significant interaction for the effect of die temperature and proportionality factor or the effect of proportionality factor and pressure on porosity by analyzing response surface of interaction of various factors. Due to the applied pressure, uneven plastic flow happens in the congealed metal shell by metallographic testing of the edge of sprue in gating system parts. © 2018, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.