| 摘要 |
Firearms (20) having scandium containing aluminum alloy components having alloying elements including light weight metals, such as magnesium, chromium, copper and zinc, heavier metals, such as zirconium, and other rare earth metals. The components have yield strengths of 82 to 100 KSI, tensile strengths of 88 to 106 KSI, 12 to 19 % elongation's, and 7 to 10 % reduction areas, and a method for treating the scandium containing aluminum alloy. The alloy is composed of 0.05 % to 0.15 % scandium, 7.5 % to 8.3 % zinc, 1.6 % to 2.2 % magnesium, 1.6 % to 2.0 % copper, 0.02 % to 0.04 % chromium, 0.05 % to 0.15 % zirconium, and 87 to 90 % aluminum. A method for making the components involves exposure to solution heat treatment of 875 DEG F for an hours or two, followed by water quench, natural aging at ambient temperature for 24 to 72 hours, artificial aging at 250 DEG F for 24 hours, and allowed to air cool. |
