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世界专利WO2006 127812中公布了美国Howmet公司研发的可用于制造飞行器和车辆用铸件的新型铸造Al合金。该合金中所含的主要合金元素含量范围是(质量分数):Zn 4%～9%、Mg 1%～4%、Cu 1%～2.5%、Si<0.1%、Fe<0.12%、Mn<0.5%、B 0.01%～0.05%、Ti<0.15%、Zr 0.05%～0.2%、Sc 0.1%～0.5%,其余是Al。含有Zn 7.48%、Mg 2.53%、Cu 1.64%、Si 0.026%、Fe 0.11%、Mn 0.056%、B 0.02%、Ti 0.06%、Zr 0.12%、Sc 0.33%、Cr 0.04%的典型合金壳型模铸件经过250℉(12 h)和310℉(3 h)时效热处理后,其拉伸强度为567.7 MPa、屈服强度为538.4 MPa、延伸率为2%。
The world patent WO2006127812 discloses a novel cast Al alloy that has been developed by the Howmet Company of the United States for the manufacture of castings for aircraft and vehicles. The main alloying element contained in the alloy is in the range of 4% to 9% of Zn, 1% to 4% of Mg, 1% to 2.5% of Cu, 0.1% of Si, Fe <0.12% 0.5%, B 0.01% -0.05%, Ti <0.15%, Zr 0.05% -0.2%, Sc 0.1% -0.5%, and balance Al. A typical alloy shell mold containing Zn 7.48%, Mg 2.53%, Cu 1.64%, Si 0.026%, Fe 0.11%, Mn 0.056%, B 0.02%, Ti 0.06%, Zr 0.12%, Sc 0.33%, Cr 0.04% The castings after heat treatment at 250 ℉ (12 h) and 310 ℉ (3 h) aging show a tensile strength of 567.7 MPa, a yield strength of 538.4 MPa and an elongation of 2%.