The invention relates to a novel particle-reinforced 7XXX aluminum
alloy ribbon and a preparation method thereof, the aluminum
alloy ribbon comprises the following components in percentage by
mass: 4.8-6.3% of Zn, 1.6-2.5% of Mg, 1.6-2.5% of Cu, 0.1-0.15% of Zr, 0.01-0.08% of Ti, 0.001-0.008% of B, and the balance of Al and other inevitable impurities, the content of a single
impurity is less than or equal to 0.1%, the content of a total
impurity is less than or equal to 0.2%, and the
microstructure of the aluminum
alloy ribbon is a fine isometric
crystal matrix structure and dispersively distributed hard particles. Compared with an existing 7XXX aluminum alloy, the strength of the prepared 7XXX aluminum alloy thin strip is improved by 25% or above, and the
ductility is improved by 35% or above by adopting the
nanoparticle reinforcement and double-roller thin strip
continuous casting technology; compared with a steel plate, the weight is reduced by 50% or more. The material can be widely applied to the field of
aerospace, such as various aircraft fuselages, wing beams, cabin wallboards, aircraft high-stress structural parts, aircraft skins, high-strength structural parts in aircraft rockets and the like, and can provide a wide space for
aerospace high reinforcement, light weight,
energy consumption reduction and fuel economy improvement.