Aluminum extrusion for high-speed train body

With the rapid advancement of the lightweight of high-speed train bodies in the world, improving the overall performance of the vehicle has become an inevitable trend of development, and increasing the width of aluminum profiles and reducing the number of welds on the high-speed train body is a reality.

necessary means to achieve this goal. In addition, the market is increasingly demanding large-section, high-precision aluminum profiles for next-generation high-speed train bodies to replace existing profiles.

Developed countries in Europe and the United States have always been in a leading position in aluminum high speed train body extrusion. Their products have the characteristics of large size, high surface finish, fine grain and high precision, and have an irreplaceable position;

However, the strength of aluminum profiles for high-speed train bodies in my country is low, and the number of body welds is large, most of which are imported from abroad. Therefore, the development of large-section, high-precision aluminum profiles for high-speed train bodies is an urgent problem to be solved in the future.

The production of aluminum extrusion for high-speed train body, in short, must have the following three basic technical conditions: (1) large-scale high-quality aluminum alloy ingot preparation technology; (2) large-scale aluminum alloy mold design and manufacturing technology; (3) ) Super large extruder and extrusion technology.

Chalco Aluminum has successfully developed 6005A and 7N01 Φ784 mm large-scale high-quality aluminum alloy ingots. After testing, the ingots have smooth surface, uniform chemical composition and structure, and low-magnification grain size of grade 1. High-speed column production by using this Φ784 mm large-scale high-quality aluminum alloy ingot

The car body floor profile has now broken through the development of 1-meter wide profiles and entered the follow-up industrialization verification stage. Our company has developed and produced super-large aluminum extrusion for high-speed train bod that meets the requirements of the assessment indicators.

It is the largest width of high-speed train body profiles at home and abroad. In the future, the production technology of large-section, high-precision aluminum alloy extrusion materials for high-speed train bodies will form an annual production capacity of 20,000 tons of super-large aluminum alloy profiles for high-speed train bodies, and will be applied to the "Fuxing" series EMU car body composition, chassis, side walls, roof and other components;

It is used in newly developed products with higher requirements.

concluding remarks

(1) With the rapid advancement of the lightweight of high-speed train bodies in the world, improving the overall performance of the vehicle has become an inevitable trend of development, while increasing the width of aluminum profiles and reducing the number of high-speed train body welds

is necessary to achieve this goal. The market is increasingly demanding large-section, high-precision aluminum profiles for next-generation high-speed train bodies to replace existing profiles.

(2) At present, the production technology of large-section and high-precision aluminum alloy extrusion materials for high-speed train bodies mainly includes the preparation technology of large-scale and high-quality aluminum alloy ingots, the design and manufacturing technology of extrusion dies for large-section aluminum alloy profiles, and the Aluminum profile isothermal extrusion technology and large-section aluminum profile heat treatment and aging technology.

(3) Our company has developed and produced oversized high-speed train body floor profiles that meet the requirements of the assessment indicators. The outer circle diameter of the profiles is 1003 mm and the length is 62 m, which is the largest width of the high-speed train body profiles at home and abroad. width.