Rail transit mainly includes railway passenger cars, freight trains, high-speed trains, subways, light rails, and maglev trains. What I want to focus on here is the high-speed train, which is what we often call the high-speed rail. China’s high-speed rail manufacturing and operation technology can be said to have reached the world’s leading level.
Lightweight rail trains, especially high-speed rail, double-deck passenger cars and subway trains, are the central issues of rail transportation modernization, and the extensive use of aluminum alloy materials is the most effective way to improve the weight of vehicles. France was the first to use aluminum alloy materials on the window frames of railway passenger cars; the United Kingdom also used aluminum alloys to manufacture the exterior wall panels and interior decoration materials of trams in 1905; during 1923-1932, the United States used aluminum alloys on railway vehicles extensively Manufacture of doors and windows, roofs, exterior wall panels, interior wall pipes, bogies, wheel cores and decorative materials for electric cars and passenger cars, etc. In the following decades, aluminum alloy has been widely used in the manufacturing of rail vehicles in various countries around the world. From the initial use of aluminum alloy to manufacture some vehicle components, it has developed to an all-aluminum structure vehicle in which the basic structural components of the vehicle are all made of aluminum alloy. Rongchuang Metal’s 5083 aluminum plates, 6061 aluminum plates, 5052 aluminum plates, 1100 aluminum plates and 7N01 aluminum plates have been used in the manufacturing of high-speed rail vehicle parts. So what are the specific advantages of aluminum rail vehicles?
First of all, the density of aluminum alloy is only one-third of that of steel. Under the same conditions, compared with the copper-containing wear-resistant steel body structure, the weight of the stainless steel body can be reduced by about 15%, and the weight of the aluminum alloy body can be reduced by more than 35%. Due to the reduced weight, the aluminum alloy body can be increased Transportation volume is 10%.
Secondly, although the fatigue resistance and impact resistance of aluminum alloy are not as good as steel, with the development of technology, many high-performance aluminum alloys have been successfully developed and the overall hollow wall panels of aluminum alloys have been successfully developed, and then more reasonable structural design methods have been adopted. , Can completely solve the problem of the defects of the appeal aluminum alloy.
Finally, aluminum alloy has better fire resistance, arc resistance and heat dissipation than steel; in addition, a thin oxide protective film can naturally form on the surface of aluminum alloy. It has better corrosion resistance than steel.
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