世界专利WO2007 111634中公布了美国科研人员研制的一种新型2000系列航空Al合金。合金的主要化学成分(质量分数)为:3.0%~4.0%Cu,0.4%~1.1%Mg,Ag≤0.8%,Zn≤1.0%,Zr≤0.25%,Mn≤0.9%,Fe≤0.5%,Si≤0.5%,其余是Al。其中,Cu和Mg含量比为(3.6~5):1。该合金具有高强度和高的损伤容限,综合性能良好,适用于变形加工或铸造方式制造的航空器用零部件。 The world patent WO2007111634 discloses a new 2000 series aviation Al alloy developed by American researchers. The main chemical composition (mass fraction) of the alloy is 3.0% -4.0% Cu, 0.4-1.1% Mg, Ag≤0.8%, Zn≤1.0%, Zr≤0.25%, Mn≤0.9% and Fe≤0.5% Si ≦ 0.5%, the balance being Al. Among them, the Cu and Mg content ratio (3.6 ~ 5): 1. The alloy has high strength and high damage tolerance, good overall performance, suitable for deformation machining or casting of aircraft parts.