Introduction:

         Aluminum alloy profiles are the most widely used non-ferrous metal structural materials in industry, in aviation, aerospace, automotive, machinery manufacturing, shipbuilding, construction, decoration. and a large number of applications in the chemical industry. With the rapid development of science and technology and industrial economy in recent years, the demand for aluminum alloy welding structure parts is increasing, so that the research of welding of aluminum alloy is also deep.rnrnThe wide application of aluminum alloy has promoted the development of aluminum alloy welding technology, while the development of welding technology has expanded the application field of aluminum alloy, so the welding technology of aluminum alloy is becoming one of the hot research.rn      

     Performance:

         The density of pure aluminum is small (2.7g/cm3), about 1/3 of iron, low melting point (660 degrees C), aluminum is a spherical cube structure, so it has a high plasticity (32 to 40%, 70 to 90%), easy to process, can be made into a variety of profiles, sheets, corrosion resistance can be good; Annealing state b value is about 8 kgf/mm2, so it is not appropriate to make structural materials. Through long-term production practice and scientific experiments, people gradually add alloy elements and the use of heat treatment and other methods to strengthen aluminum, which has obtained a series of aluminum alloys. Adding a certain element to form an alloy in the maintenance of pure aluminum light and other advantages, but also can have a higher strength, the value of the b can be up to 24 to 60 kgf/mm2. This makes its ratio of strength (the ratio of strength to proportion of sb/ ) better than many alloy steel, become the ideal structural material, widely used in machinery manufacturing, transportation machinery, power machinery and aviation industry, aircraft fuselage, skin, compressor and so on often made of aluminum alloy, in order to reduce self-weight. With the use of aluminum alloy instead of steel plate material welding, the weight of the structure can be reduced by more than 50%.