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Oxygen-filled die-casting is only applicable to Aluminum Alloy Die-Casting. The so-called oxygen-filled die-casting refers to filling the dry explosion oxygen into the chamber and the die-casting mold cavity to replace the air and other gases in it, so that the oxygen remaining in the mold cavity during the die-casting process reacts with the aluminum liquid to form A and O particles, thus eliminating the air holes formed in the die-casting without oxygen filling. This kind of Az0 material has fine grains, about below Ipm, and its mass star accounts for 0.19%~0.2% of the total mass weight of the die casting, which does not affect the mechanical properties, and can make the die casting undergo heat treatment. Oxygen-filled die casting is an effective way to eliminate air holes in aluminum alloy die castings and improve the quality of die castings.