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Aluminum alloys, which are made of copper, zinc, manganese, silicon and magnesium, were invented in the early 20th century by Alfred Wilm, a German who was instrumental in the development of aircraft, the composition of German aluminium alloys was classified as a state secret after the First World War. It is lighter and more resistant to corrosion than ordinary carbon steel, but less resistant to corrosion than pure aluminum. Aluminum alloys are widely used in engineering structures. According to the processing method, aluminum alloy can be divided into two categories: wrought aluminum alloy and cast aluminum alloy.
Aluminum alloy material has low density, but high strength, close to or more than high-quality steel, good plasticity, can be processed into a variety of profiles, with excellent conductivity, thermal conductivity and corrosion resistance, widely used in industry, second only to steel in use. Some aluminum alloys can be heat treated to obtain good mechanical properties, physical properties and corrosion resistance.
1. Application of aluminum alloy in aviation and spaceflight
Aluminum alloy is the main material for subsonic aircraft. There are 400 ~ 1.5 million aluminum alloy rivets per aircraft. Although the proportion of aluminum parts in advanced military aircraft is lower, it still accounts for 40% ~ 60% of its total mass.
2. Application of aluminum alloy in automobile
3/4 of aluminum alloy for automobile is cast aluminum alloy, mainly engine parts, transmission parts, chassis running parts.
3. Application of aluminum alloy in ship
Aluminum alloys used on ships can be divided into wrought and cast aluminum alloys. The application of wrought aluminum alloys in shipbuilding in various countries, from large surface ships, base and superstructure, thousands of tons of all aluminum oceanographic research vessels to hovercraft, ferries, traffic boats and other high-speed passenger ships and military speedboats. Casting aluminum alloy is mainly used for pump, piston and other parts.
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