Views: 11 Author: Site Editor Publish Time: 2020-07-20 Origin: Site
Shrinkage rate of die casting refers to the relative change rate of die forming size and actual size of die casting at room temperature
The shrinkage rate of die casting includes liquid volume shrinkage of metal liquid, solidification phase transformation shrinkage and solid volume shrinkage
The more complex the casting structure is, the more core number is, and the more factors hindering shrinkage are, so the shrinkage rate is small, and vice versa.
The higher the casting temperature, the higher the shrinkage rate, and vice versa.
The shorter the stay time in the mold, the higher the demulsification temperature, the higher the shrinkage rate of the casting, and vice versa.
The free shrinkage of al - si alloys is usually 0.7-0.9%