Aluminum alloy is the most widely used non-ferrous metal structural materials in industry, in aviation, aerospace, automotive, machinery manufacturing, shipbuilding and chemical industry has been a large number of applications.With the rapid development of science and technology and industrial economy, the demand for aluminum alloy welded structural parts is increasing day by day.The extensive application of aluminum alloy promotes the development of aluminum alloy welding technology, and the development of aluminum alloy welding technology expands the application field of aluminum alloy, so the welding technology of aluminum alloy is becoming one of the research hotspots.
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 annealed state sigma b value is about 8kgf/mm2, so it is not suitable to be used as a structural material.Through long-term production practice and scientific experiments, people gradually add alloy elements and use heat treatment methods to strengthen aluminum, which has obtained a series of aluminum alloy.
Advantages of aluminum alloy lamp pole:
1. Good anti-corrosion performance
2. Abundant surface treatment methods
3. Maintenance free
4, light weight, convenient transportation and installation
5. Plug-in installation can be adopted
6, than iron lamp pole and FRP lamp pole life longer
7. 100% recycling, low melting temperature, energy saving and emission reduction
8. Less amplitude than the fiberglass lamp pole
The defect of aluminium alloy lamp pole: opposite iron lamp pole, the intensity of aluminium alloy lamp pole is some lower relatively, nevertheless can pass the heat treatment of later period, make the intensity of aluminium alloy lamp pole achieves the standard of T6.
Because aluminium alloy lamp pole is specific other lamp pole is incomparable numerous advantage, be in so euramerican wait for developed country, aluminium alloy lamp pole has been used very commonly, at present domestic still is in initial stage.