Aluminum alloys usually use copper, zinc, manganese, silicon, magnesium and other alloy elements, compared with ordinary carbon steel has a lighter and corrosion resistance, but corrosion resistance is not as good as pure aluminum. In a clean, dry environment, the surface of the aluminum alloy forms a protective oxide layer.
Aluminum alloy is a kind of non-ferrous metal structure material suing widely used in industry, which has been widely used in aviation, aerospace, automobile, machinery manufacturing, marine and chemical industry.
Physical characteristics:
Aluminum alloy has low density, but high strength, close to or more than alloy steel, good plasticity, and can be processed into various profiles, with excellent conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its use amount is only less than that of steel.
Some aluminum alloys can be heat treated to obtain good mechanical properties, physical properties and corrosion resistance. The AI Cu mg system of duralumin alloy, which generally contains a small amount of Mn, can be heat treated and strengthened. It is characterized by high hardness but poor plasticity. Superhard aluminum belongs to Al Cu mg Zn system, which can be strengthened by heat treatment. It is an aluminum alloy with strength at room temperature, but it has poor corrosion resistance and rapid softening at high temperature. Wrought aluminum alloy is mainly Al Zn mg SI system alloy. Although there are many kinds of elements added, the content is less, so it has excellent thermoplasticity and is suitable for forging, so it is also called forged aluminum alloy.
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