In addition to better die-casting process performance and better mechanical properties, die-cast aluminum alloy also needs to have the following process properties:

①Good thermoplastic rheological properties. It should have good thermoplastic rheological properties when the superheat is not high and near the liquid and solidus temperature to achieve the filling of complex cavities, form a good casting surface, and avoid shrinkage defects. ；

②Smaller linear shrinkage, avoiding cracks and deformation during die-casting, and improving the dimensional accuracy of products

③The small solidification temperature range facilitates rapid simultaneous solidification and reduces the number of defects such as internal shrinkage holes;

④Good high-temperature thermal strength to avoid thermal cracking or serious deformation when opening the mold;

⑤Good casting/mold interface performance, no chemical reaction with die-casting mold, low affinity, avoid sticky mold and alloying reaction at the casting/mold interface;

⑥Good physical and chemical properties, it is not easy to inhale and oxidize in the high-temperature molten state, and can meet the needs of long-term heat preservation in the die-casting process.