Die-casting aluminum alloy smelting is an important process in the process of die-casting production.The un-strictly control of smelting process would lead to the increase of slag content and gas content in liquid aluminum and chemical composition change

resulting in pinhole

oxidation slag inclusion

shrinkage porosity and unqualified chemical composition

and affecting the quality of the casting.The key processes such as the mixture of old and new materials before smelting

smelting temperature

smelting slag removal and purification of liquid aluminum

refining and degassing were analyzed and discussed

so as to determine a reasonable process range

providing high-quality liquid aluminum and obtaining qualified castings.