Application of new magnesium alloy curtain wall

In today's world, the types of materials used for metal curtain walls are relatively simple. The types include some aluminum composite panels, single-layer aluminum panels, stainless steel panels, and color-coated steel panels. The mechanics of metal materials and their own characteristics give the metal curtain wall a unique external wall decoration effect. Different metal materials reflect their unique quality characteristics such as the elegance and luxury of bronze; the high strength and high corrosion resistance of stainless steel; the diversified colors of aluminum alloy surfaces and the lightness of magnesium alloys.

At present, the relevant concepts of energy saving and consumption reduction have penetrated into various industries, and they are all developing energy saving and consumption reduction related technologies and formulating sustainable development strategies. Building energy saving mainly starts from the peripheral system of the building. In the external structure of the building, in order to reduce the load on the steel keel, the lightweight building curtain wall material is developed to reduce the amount of steel keel, so as to achieve the purpose of effectively saving high energy-consuming building materials.

Magnesium alloy has the characteristics of low density (the density of pure magnesium is 1.749 / cm3, about 64% of aluminum, 25% of zinc and 20% of steel), and high specific strength. In recent years, some material researchers have developed a series of magnesium alloy sheets with high strength and excellent room temperature formability based on the advantages of magnesium alloys, such as AZ31 and Mg-ZnRE series magnesium alloys. Its tensile strength can reach more than 200MPa, elongation can reach more than 20%. This fully shows that magnesium alloy can not only meet the strength requirements of high-rise building curtain walls, but also meet the requirements of specific buildings for sheet forming performance. Therefore, the use of magnesium alloy materials in building curtain walls has great potential for development.

Although magnesium alloy has the strength comparable to aluminum alloy, it weighs only about 64% of the same volume of aluminum alloy, and it has good room temperature moldability, making it possible for magnesium alloy to be used in the field of metal curtain walls. But there are also some problems that need to be solved urgently.

As a panel material used in building curtain walls, the excellent thermal conductivity of magnesium alloys has become a bottleneck problem restricting the use and development of magnesium alloy curtain walls. Curtain wall materials with better thermal conductivity are neither economical nor energy-saving for the building itself.

The magnesium alloy sheet is relatively thin and light, which can reduce the amount and strength of the keel and the connecting pieces, but for high-rise and super-high-rise buildings, it is necessary to ensure the deformation resistance of the curtain wall system.

Regarding the characteristics of magnesium alloys and the problems that may exist during use, the following solutions are proposed for improvement.

According to the requirements of the curtain wall, the processing method of the magnesium alloy curtain wall material can be improved. Using the thinking of the composite material, the magnesium alloy composite board is customized and produced. Ethylene or rigid polyethylene foam board, composed of composite materials. The magnesium alloy board is coated with fluorocarbon resin coating to form a tough and stable protective layer, and the back of the board is coated with polyester paint to prevent possible corrosion due to moisture. The improvement of processing technology can solve the problem of weak thermal insulation performance of magnesium alloy as a metal curtain wall material, and provide a new idea for the application of new materials.

For the application of new materials in metal curtain walls, this is a new field. It is necessary to perform scientific mechanical calculations on each important part of each building. The considerations should include wind pressure, dead weight, earthquake, temperature and durability. The strength of the embedded parts and keel system is carefully checked to achieve energy saving but not inferior.

With the development of new metal materials and the development of new architectural concepts, magnesium alloy metal materials have a very broad application prospect. Its excellent molding performance and strength ensure the possibility of being used as a curtain wall material, but the magnesium alloy itself also has some problems, but it cannot be wasteful because of choking. It requires our continuous efforts to find and improve problems. The application market of magnesium alloys will be raised to another level, providing a broad stage for the development of new buildings.