Ultra high strength aluminum alloys and non-rapid solidification method for preparing

The present invention discloses a class 770MPa ultrahigh-strength aluminum alloys and non-rapid solidification method of preparation, preparation technical field belonging to the super-alloy, aluminum alloy, the percentage by mass of zinc is 8.8 to 9.4%, 2.75 mass percent of magnesium ~ 2.85%, a percentage by mass of copper, 1.8 to 2.2% by mass percentage of zirconium 0.25 to 0.55% by mass percentage of strontium from 0 to 0.025%, the balance being aluminum, and alloying elements Mg and Zn mass percentage of ratio should satisfy 3≤WtZn / WtMg≤4, Mg mass percentage WtMg should meet 2% ≤WtMg≤3%. The alloy preparation process comprises sequentially: casting, homogenization annealing, hot extrusion, solution heat treatment, aging treatment, the resulting aluminum alloy 770MPa grade in tensile strength while maintaining elongation at 7.0% or more, the process is simple, cost low, more conducive to industrialization.