Effect of local time delay on mechanical properties and microstructure of dual squeeze casting gearbox

Aiming at solving the problem of shrinkage in complex squeeze casting, Aluminum Alloy gearbox was taken as the research object, and the numerical simulation was done with the professional casting analysis software ProCAST. The characteristics of casting structure were analyzed, and the possible defects of casting solidification were predicted and analyzed. The results show that under the casting temperature is 680°C, the injection pressure is 120MPa and the mold preheating temperature is 200°C, the casting almost has no shrinkage porosity by carrying out two times of pressure on the most of the bottom of the box. Then the dual squeeze casting experiment was done to verity the reasonability of dual squeeze casting technology by X-Ray detection, microstructure analysis.