Light weight, high strength aluminum alloy pipeline

Aluminum alloy is a kind of nonferrous metal structural material widely used in industry, which has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. Pure aluminum is divided into smelting products and pressure processing products. The former is denoted by chemical composition Al, while the latter is denoted by Chinese pinyin LV (aluminum and industrial products).

The main welding pores of aluminum and aluminum alloy are hydrogen pores. Aluminum can absorb and dissolve a large amount of hydrogen in liquid state, with a solubility of 0.0069ml/g in the molten state and 0.00036 ml/g in the high-temperature solidification state, with a difference of nearly 20 times. The thermal conductivity of aluminum is very large. Under the same welding process, the cooling speed of aluminum is 4 ~ 7 times that of steel, which accelerates the crystallization of metal. During the rapid cooling process of welding pool, the solubility of hydrogen drops sharply, and a large amount of susaturated gas is precipitated at this time, and hydrogen is too late to precipitate and form pores in weld metal. Therefore, when welding aluminum, the tendency of porosity is very big.

Aluminum alloy pipe, said that the superplastic forming is obtained by thermomechanical treatment of aluminum alloy is less than 10 microns of ultrafine grain, these ultrafine grain of alloy is higher than the melting point and low strain rate to win a superplastic conditions, can be formed out of the traditional method is difficult to obtain the quality of the light, the cost is low, the shape of complex components, and has high forming pressure is small, die life and many other advantages, is a precision forming.

Aluminum alloy is widely used in all kinds of welded structural products because of its light weight, high strength, good corrosion resistance, non-magnetic, good formability and low temperature performance. Therefore, aluminum and aluminum alloy in addition to a wide range of applications in aviation, aerospace and electrical fields, but also more and more applications in the petrochemical industry.

Aluminum alloy formwork is light in weight, high in processing accuracy, easy to be installed and removed, more times of use of formwork, less amortization cost, wide in application, and good in surface quality of formed concrete. It is a new type of formwork with significant comprehensive benefits and meets the requirements of national energy conservation and environmental protection.