heat sink extrusion
Aluminium alloy profile is the most widely used in industry of non-ferrous metal structural materials, in aviation, aerospace, automotive, machinery manufacturing, shipbuilding, construction, decoration and have been extensively applied in chemical industry. With the rapid development of science and technology and industrial economy in recent years, the demand for aluminum alloy welding structure is increasing, and the welding research of aluminum alloy is also deepened.
Aluminum alloy is widely used to promote the development of aluminum alloy welding technology, at the same time, the development of welding technology and expand the application field of aluminum alloy, thus the welding technology of aluminum alloy is becoming one of the hot spot of research.
The density of pure aluminum (rho = 2.7 g/cm3), is about 1/3 of the iron, low melting point (660 ℃), aluminum is face-centered cubic structure, therefore, has the very high plasticity (delta: 32 ~ 40%, and bits of: 70 ~ 90%), easy to machining, can be made into all kinds of shapes, plates, corrosion resistant performance is good. However, the strength of pure aluminum is very low, and the value of the annealing state is about 8kgf/mm2, so it is not suitable for structural materials. Through long-term production practices and scientific experiments, people gradually strengthened aluminum by adding alloy elements and using heat treatment methods, which resulted in a series of aluminum alloys. In addition, the alloy with certain elements can have high strength while maintaining the advantages of pure aluminum, and the value of b can be up to 24~60kgf/mm2 respectively. That makes it "stronger."