Overview of aluminum alloys The general term for aluminum-based alloys. The main alloying elements are copper, silicon, magnesium, zinc and manganese, and the secondary alloying elements are nickel, iron, titanium, chromium and lithium. Aluminum alloy can be divided into two categories: cast aluminum alloy and wrought aluminum alloy, and aluminum alloy can be divided into wrought aluminum alloy and cast aluminum alloy according to processing methods. Wrought aluminum alloys can be divided into non-heat treated aluminum alloys and heat treated aluminum alloys. Heat-treatable strengthened aluminum alloys can improve their mechanical properties by means of heat treatment such as quenching and aging, which can be divided into hard aluminum, forged aluminum, superhard aluminum and special aluminum alloys. Cast aluminum alloys can be divided into aluminum-silicon alloy, aluminum-copper alloy, aluminum-magnesium alloy, aluminum-zinc alloy and aluminum-rare earth alloy according to chemical composition. Among them, Al-Si alloy includes simple Al-Si alloy (which can not be strengthened by heat treatment, with low mechanical properties and good castability) and special Al-Si alloy (which can be strengthened by heat treatment, with high mechanical properties and good castability). Pressure-processed aluminum alloys can be divided into antirust, hard, forged, superhard and coated products. Special and brazed cast aluminum alloys Cast aluminum alloys (ZL) are divided into four categories according to the main elements other than aluminum: silicon, copper, magnesium and zinc. High strength aluminum alloy refers to aluminum alloy with tensile strength greater than 480 MPa. The typical use of aluminum alloy is 1050 hose. Fireworks powder 1 199 electrolytic capacitor foil 1350 conductor, conductive stranded wire 20 1 1 screw 2024 airplane, rivet 2036 automobile body sheet metal part 2 124 aerospace structure part 22/kloc-0. 9 covered electrode uses 22 19 alloy to weld and fill bottle caps and bottle stoppers, and 5 182 pieces of cable sheath rivets, zippers and nails are used to process cans, automobile body panels, control panels, reinforcements, brackets and other parts, and 5456 armor plates, 5A02 aircraft fuel tanks, 5A03 welding containers and welding wires can be used to replace 5A02 alloy 5a03. Cold die forgings, stress parts of welded and stretched containers, welded structural parts 5A 12 of aircraft skin bone parts, extruded profiles and pipes of bulletproof deck 6005, used for structural parts with strength and height greater than 6063 alloy. Such as ladders, TV antennas and other 6009 automobile body panels 60 10 thin plates: automobile body 606 1 requires various industrial structures to have certain strength, weldability and high corrosion resistance, such as manufacturing pipes, bars, profiles and plates. 6063 building profiles are used for trucks, tower buildings, ships, trams, furniture, mechanical parts and precision machining. Irrigation pipes and extrusion materials for vehicles, benches, furniture, fences, etc. 6066 forgings and welded structure extrusions 6070 extrusions and pipes for heavy-duty welded structure and automobile industry 6 10 1 high-strength bars, conductors and heat dissipation equipment for passenger cars 15 1 used for forging crankshaft parts, machine parts and producing rolling rings. Used for 620 1 high strength conductive rod wire 6205 thick plate, pedal and high impact extrusion 6262. The corrosion resistance of threaded high stress parts is better than that of 20 1 1 and 20 17 alloys. After anodic oxidation treatment, 6463 pipes for water and oil, profiles of buildings and various appliances, and 6A02 aircraft engine parts for automobile decoration have bright surfaces, and 7005 forgings and die forgings with complex shapes are extrusion materials, which are used to manufacture welded structures with high strength and fracture toughness, such as trusses, bars and containers of transport vehicles. Large heat exchangers, and parts that cannot be solid-solution treated after welding; It can also be used to manufacture sports equipment, such as tennis rackets and softball bats, 7039 frozen containers, cryogenic equipment and storage boxes, fire-fighting pressure equipment, military equipment, armor plates and missile devices. 7049 can be used to forge parts with the same static strength and high stress corrosion cracking resistance as 7079-T6 alloy, such as aircraft and missile parts-landing gear hydraulic cylinder and extrusion parts. The fatigue performance of the parts is almost the same as that of 7075-T6 alloy, while the 7050 aircraft structural parts with higher toughness are made of plate, extrusion, free forgings and die forgings. The alloy requirements for manufacturing this kind of parts are: high spalling corrosion resistance, stress corrosion cracking ability, fracture toughness and fatigue resistance, 7072 air conditioning aluminum foil and ultra-thin strip; Cladding layers of 22 19, 3003, 3004, 5050, 5052, 5 154, 606 1, 7075, 7475, 7 178 alloy plates and pipes are used to manufacture aircraft structures and futures. He requires high strength and corrosion resistance. T736 material has good comprehensive properties, namely, high strength, spalling corrosion resistance, stress corrosion cracking resistance, fracture toughness and fatigue strength. 7 178 can be used to manufacture aerospace parts with high compressive yield strength, such as 7A04 aircraft skin, screws, and stress components such as girders, frames, ribs and landing gears.