What is Aluminum Building Profile
2019-03-05人阅读
Buildings made of aluminium and aluminium alloys. Usually it is processed into castings, forgings, foil, plate, strip, pipe, bar, profile and so on. Then it is made by cold bending, sawing, drilling, assembling, coloring and other processes.
performance
Pure aluminium has low strength and its use is limited. However, by adding a small amount of one or several alloying elements, such as magnesium, silicon, manganese, copper, zinc, iron, chromium, titanium and so on, aluminum alloys with different properties can be obtained. Aluminum alloy is further strengthened and hardened by cold working and heat treatment, and its tensile strength is greatly improved.
The standard potential of aluminium is - 1.67 volts. Its chemical properties are very active. It is easy to react with oxygen in the air to form a solid and dense oxide film. Therefore, it has good corrosion resistance in ordinary atmosphere and clean water. However, electrochemical corrosion will occur in contact with steel or other metal materials, concrete, cement mortar, lime and other alkaline materials in humid environment, and wood, soil and other contact will also produce corrosion. Therefore, proper anti-corrosion treatment is needed.
Production method
Aluminum alloys are divided into cast and deformed aluminum alloys according to their different production modes. Deformed aluminium alloys are commonly used in buildings to roll plates, foils and strips, and extrude rods, tubes or profiles of various complex shapes. Deformed aluminium alloys are classified into rust-proof aluminium alloys, hard aluminium alloys, superhard aluminium alloys and special aluminium alloys according to their properties and uses. Industrial pure aluminium (L1-L1), rust-proof aluminium alloy (LF2, LF21, etc.) and forged aluminium (LD2) are commonly used in buildings.
Characteristics and uses
The biggest characteristic of aluminium and aluminium alloys is that their bulk density is about 1/3 of that of steel, and their specific strength (the ratio of strength limit to specific gravity) can reach or exceed that of structural steel. Secondly, aluminium and aluminium alloys are easy to be processed into various shapes and can adapt to various joining processes, thus providing favorable conditions for the most economical and reasonable cross-section form of building structures. Therefore, the use of aluminium alloy can not only greatly reduce the weight of buildings, save materials, but also reduce the workload of transportation and installation of components, and speed up the construction progress. The economic effect is more significant in the earthquake area and in the mountainous and remote areas where traffic is inconvenient. Aluminum and aluminium alloys have beautiful colour, good corrosion resistance, high reflectivity to light and heat, and good sound absorption. Various colours can be obtained by chemical and electrochemical methods. Therefore, aluminium materials are widely used in roofing, wall, doors and windows, skeleton, interior and exterior decorative panels, ceilings, ceiling, railing handrails, interior furniture, store containers and construction templates of industrial and civil buildings.
The construction industry is one of the three major markets for aluminium. About 20% of the world's total aluminium production is used in the construction industry. In some developed industrial countries, the amount of aluminium used in the construction industry has accounted for more than 30% of its total output. In recent years, the products of building aluminium are constantly updated, and the application of new building products such as color aluminium plate, composite aluminium plate, composite doors and windows frame, aluminium alloy template is also increasing year by year. Aluminum alloys have been used in industrial and civil buildings in China to make roofs, walls, doors and windows, and gradually expanded to interior and exterior decoration, construction formwork, etc. Good results have been achieved.
