▎ 摘　　要

NOVELTY - Preparing high-strength aluminum alloy involves placing graphene in sensitizing solution consisting of 0.15 mol/L stannous chloride and 0.15 mol/L hydrochloric acid, sonicating at 25-30 degrees C for 30-45 minutes, filtering and rinsing with deionized water until neutral. Graphene is added to an activation solution consisting of 0.0018 mol/L palladium chloride and 0.3 mol/L hydrochloric acid, sonicated at 25-30 degrees C for 30-45 minutes, filtered and washed with deionized water. The graphene is added to the plating solution and sonicated at 25 degrees C and pH 12 for 45-60 minutes. USE - Method for preparing high-strength aluminum alloy. ADVANTAGE - The method enables to provide high-strength aluminum alloy where modified graphene treatment process and the mixing process are matched with each other, and easy-to-control powder metallurgy technology is adopted, and has simple and convenient operation. DETAILED DESCRIPTION - Preparing high-strength aluminum alloy involves placing graphene in sensitizing solution consisting of 0.15 mol/L stannous chloride and 0.15 mol/L hydrochloric acid, sonicating at 25-30 degrees C for 30-45 minutes, filtering and rinsing with deionized water until neutral. Graphene is added to an activation solution consisting of 0.0018 mol/L palladium chloride and 0.3 mol/L hydrochloric acid, sonicated at 25-30 degrees C for 30-45 minutes, filtered and washed with deionized water. The graphene is added to the plating solution and sonicated at 25 degrees C and pH 12 for 45-60 minutes, filtered and washed with deionized water to neutrality, vacuum-dried at a temperature of 50 degrees C or 24-25 hours Modified graphene, where the plating solution comprises 10 g/L copper sulfate, 1 g/L nickel sulfate, 15 g/L sodium citrate, 30 g/L sodium hypophosphite, and 35 g/L boric acid. The modified graphene and aluminum alloy powder are wet-mixed with alcohol in a V-type blender for 2-3 hours, and after alcohol volatilization, dry blending is performed for 45-60 minutes, and the speed of the V-type blender is 100-120 revolution per minutes, obtained composite powder, where amount of the modified graphene accounted for 0.3 wt.% of the composite powder. The composite powder is pressed into a blank in a vacuum or inert atmosphere at a temperature of 490 degrees C for 30 minutes, and the obtained preform is sintered in a vacuum or an inert atmosphere at 500 degrees C and 25 maga Pascals for 1 hour, followed by 1 pass roll forming, the pressing amount is 60% to obtain the high-strength aluminum alloy.