压铸是在压力为20～200MPa、70～150m/s速度下形成铸件,因而铸件内部常出现气孔,既影响了铸件的致密性和气密性,又使压铸件失去了淬火处理和焊接的可能性。因此,采用了充氧压铸工艺,以消除压铸件的气孔。充氧压铸是在压铸模和压铸机的压射缸中充入氧气,在压铸的压射成形过程中,氧气和铝形成1μm或更小的Al_2O_3化合物,以0.1～0.2％的含量存在于合金中。这种充氧压铸法是以氧气取代压铸模型腔和压射缸中 Die casting is formed at a pressure of 20 ~ 200MPa, 70 ~ 150m / s speed casting, and thus often appear inside the casting porosity, both affect the tightness of the casting and gas tightness, but also the casting lost the possibility of quenching and welding . Therefore, the use of oxygenation die-casting process to eliminate the pores of die-casting. Oxygen pressure die casting is in the injection mold and die casting machine injection cylinder filled with oxygen, in the injection molding process, the formation of oxygen and aluminum 1μm or less Al_2O_3 compounds, the content of 0.1 ~ 0.2% in the alloy in. This oxygenation die-casting method is replaced by oxygen die casting cavity and injection cylinder