Title: Application and development of aluminum alloy extruded profiles Body text: Aluminum alloy extruded profile is a kind of aluminum alloy as raw material, through the extrusion processing method made of various section shapes of aluminum profiles. Due to its advantages of light weight, high strength and easy processing, it is widely used in construction, transportation, electronic appliances and other fields. In the field of construction, aluminum alloy extruded profiles are widely used in door and window curtain wall systems. Its excellent corrosion resistance, good welding performance and excellent decorative effect make it occupy an important position in the construction industry. In addition, aluminum alloy extruded profiles also play an important role in the construction of infrastructure such as Bridges and tunnels. In the field of transportation, aluminum alloy extruded profiles are widely used in the manufacturing of cars, trains, ships and other transportation vehicles because of their characteristics of light weight, high strength and good impact resistance. Especially in the field of new energy vehicles, the application of aluminum alloy extruded profiles is more extensive, which helps to improve the vehicle's driving range and reduce energy consumption. In the field of electronic and electrical appliances, aluminum alloy extruded profiles are widely used in the shell manufacturing of electronic equipment because of their good heat dissipation performance, electromagnetic shielding performance and anti-interference performance. This helps to improve the performance stability and service life of electronic devices. With the progress of science and technology and the development of industry, the application field of aluminum alloy extruded profiles is still expanding. In the future, with the further development of material science and processing technology, the performance of aluminum alloy extruded profiles will be more superior, and its application prospects will be broader. Material selection and characteristics: The main raw materials of aluminum alloy extruded profiles are aluminum alloys, which are mainly 6000 series and 7000 series aluminum alloys. 6000 series aluminum alloy has good corrosion resistance and welding performance, suitable for construction, transportation and other fields; 7000 series aluminum alloy has higher strength and hardness, suitable for high strength requirements. In addition, in order to improve the performance of aluminum alloy extruded profiles, appropriate amounts of trace elements can also be added according to needs, such as magnesium, silicon, copper and so on. Aluminum alloy extruded profiles have the following characteristics: light weight and high strength, good corrosion resistance, easy processing, excellent decorative effect, good welding performance, good heat dissipation performance, good electromagnetic shielding performance, etc. These characteristics make aluminum alloy extruded profiles have a wide range of application prospects in various fields. In short, as an important metal material, aluminum alloy extruded profiles have broad application fields and good development prospects. In the future development, we should continue to increase scientific research efforts to improve the performance of aluminum alloy extruded profiles to meet the growing market demand.