Aviation aluminum extrusions plates has a series of advantages, such as low density, about 1/3 of steel, strong corrosion resistance, high fatigue strength, strength performance, specific strength and specific stiffness headlamp. It is an ideal material for aircraft and spacecraft structure. At present, the amount of
aviation aluminum extrusions plates used in civil aircraft accounts for 60-80% of the aircraft's mass, and the amount used in the fourth and fifth generation military aircraft is not less than 20%. In recent years, although the application of titanium alloys and composite materials in aircraft has been challenged, new alloys have emerged in batches due to the abundant resources of aluminium, the advantages of aluminium alloys, such as excellent performance, easy processing, reasonable price and strong recyclability, and the emergence of new heat treatment status of traditional aluminium alloys. Material processing technology is constantly updated. Before 2030, the preferred material advantage of aluminum alloy re-flying chess structure is irreplaceable.
Aviation aluminum extrusions plates accounts for more than 80% of the second-generation fighter structural materials designed and developed by China. Aluminum still accounts for 60% - 70% of the third-generation fighter airframe structure.
Aviation aluminum extrusions plates in Wuzhi-10 and J-31 is also one of the main structural materials.
In order to meet the requirements of the design modification of the old aircraft and the development of the new aircraft for the comprehensive performance of aluminium material and the multi-variety, multi-specification and multi-heat treatment status of the airframe, Chalco Aluminum has started the research work on 7075-T73, 7075-T76, 2024-T3\ T6\ T8, 7475-t73, 7475-T76, 7050-t74, 2124-T851, 2224-t3, 2324-T39 and 7175-t74 etc alot of
aviation aluminum extrusions plates. The main load-bearing components of Yun-10, such as fuselage, wing and tail, are largely made of domestic alloy 2112 and 7A04. The lower wing panels of ARJ21 aircraft adopt 2524-T3 and 2324-T39 aluminium alloys, and the upper wing panels adopt 7150-T7751 and 7055-t7751 pre-stretched aluminum thick plates with high strength and corrosion resistance. 7150 alloy is also widely used in wing beam, fuselage truss, fuselage frame, partition frame, upper truss and wing beam. In addition, ARJ21 aircraft also selected 7050, 7075, 2024 and other alloys, but the amount is not large.
