Compressed air pipeline transportation and storage should pay attention to what

Super aluminum alloy compressed air pipeline transportation and storage should pay attention to avoid collision, extrusion, scratch pipe, storage should be separated from iron, stainless steel, copper and other metals, so as to avoid electrochemical corrosion. Aluminum and aluminum alloy tube cutting can be used by hand saw blade, machinery (sawing machine, lathe, etc.) and grinder, not flame cutting; Groove should be used for mechanical processing, do not use oxygen - acetylene flame. Aluminum and aluminum alloy pipe connections are generally welded and flanged. Manual argon tungsten arc welding, oxyacetylene welding and semi-automatic argon welding of melting pole can be used for welding.

However, with the increase of the size of the workpiece and the influence of the shape of the workpiece, the existing forming equipment cannot form the aluminum alloy at one time. The microstructure and properties of the metal will change obviously in the process of many times of intermediate heating, which will show different mechanical behaviors in the subsequent deformation.

The change of mechanical behavior is usually manifested as the decrease of rheological stress, that is, the softening of deformed materials. This softening phenomenon is usually the result of subdynamic recrystallization, static recrystallization and static recovery. However, the effect of multiple forming on the microstructure and properties of aluminum alloy is still not fully studied.

Aluminum alloy has small density and high strength, and its ratio of tensile strength to density is 9~15. Aluminum alloy has good corrosion resistance and oxidation resistance, most of the aluminum alloy in fresh water, seawater, concentrated nitric acid, nitrate acid, gasoline and all kinds of organic matter have a good amount of corrosion resistance. Aluminum alloy has good thermal conductivity, electrical conductivity and cutting performance.

Is often accompanied by the improvement of the performance of the die casting aluminum alloy mechanical casting process is reduced, the performance of pressure casting because of the high pressure of rapid solidification characteristics make the contradiction more prominent in some respects, so difficult to general die casting solution heat treatment, it restrict the improvement of the die casting aluminum alloy mechanical properties, although oxygen filling die casting, vacuum die casting, etc is an effective way to improve the mechanical properties of the alloy, but still widely used have certain difficulty, so the development of the new type of die casting aluminum alloy has been performed.