High-end industrial aluminum materials need to seek new development

by:Zeyi     2021-12-22
High-end industrial aluminum plays an important role in the process of high-speed trains, and after the 'July 23' train accident, the demand for aluminum materials for high-speed rail and rail transit with excess capacity quickly cooled. : the best partner for high-speed rail cars. The high-speed running of trains is a systematic project, which contains many technical conditions and methods. The lightweight of railway trains is an important way to achieve high-speed and heavy-duty trains, that is, under other conditions. In the same situation, the lighter the train, the faster the speed. Aluminum profiles are undoubtedly the best lightweight material. As early as the 1950s, some of the more developed countries in the world began to use aluminum profiles to manufacture railway vehicles, including the United States, Canada, Japan, Russia, Germany and France.  Analyzing from the characteristics of the material, comparing the density and strength of aluminum alloy and steel, we know that aluminum alloy is really the best partner for high-speed rail cars. The density of aluminum alloy is about one-third of the density of steel, so if the volume is the same, the weight of aluminum alloy is one-third of the weight of steel.   In terms of strength, the strength of pure aluminum is very low, but the alloy formed by adding certain elements has higher strength. Its 'specific strength' (the ratio of strength to specific gravity) is better than many alloy steels and becomes an ideal structural material. The tensile strength of high-strength aluminum alloy is greater than 480 MPa, which can fully meet the strength standards of high-speed rail train carriages. At the same time, aluminum alloy has good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity and corrosion resistance, and is widely used in industry.   There are many types of aluminum alloys. Among them, 6000 series aluminum alloys are mostly used in high-speed rail cars. The alloy is magnesium and silicon. It is an aluminum-magnesium-silicon alloy.   Because industrial aluminum profile profiles have the advantages of light weight, excellent molding, high strength, corrosion resistance, long life, renewable, less pollution, and low maintenance costs, they stand out among many materials and have become the favorite of high-speed rail. The large-scale use of aluminum alloy materials on the carriages has greatly reduced the weight of high-speed rail trains, making an important contribution to the high-speed trains.  The demand for high-end industrial aluminum profile materials in the era of high-speed rail has soared. Due to the large-scale development of high-speed railways in China in recent years, the demand for aluminum materials for high-speed rail cars is very large. However, the production of aluminum profiles for rail transit cars has very high technical requirements. Although the application of this technology has a history of more than 30 years in the world, the process is complicated and the production process is difficult to control. There are only four or five in the world. The country can produce. Four or five years ago, my country's rail transit car body aluminum profiles almost all relied on imports. The price per ton of imported car body aluminum profiles reached a maximum of RMB 130,000, which was almost 10 times the price of aluminum ingots. In general, foreign production lines are more mature and stable in technology and more expensive. Large state-owned enterprises mainly use foreign production lines, especially large-scale production lines of more than 5,000 tons and automatic production lines that are basically not available in China. Although domestic production lines can basically meet the requirements and the prices are cheaper, they are more troublesome to maintain and have a service life that is not as good as that of foreign ones. Due to insufficient funds, private enterprises often use domestic brand production equipment. On the whole, the mainstream industrial aluminum profile production line is still a foreign brand. Only in this way can the produced aluminum alloy material have a more reliable quality. Therefore, for China's industrial aluminum profiles to be truly localized, technological breakthroughs in production equipment need to be strengthened to complete the localization of production lines. After a series of actions, the rapid development of China's high-speed rail will be significantly affected, the demand for high-speed trains will drop, and the demand for aluminum materials for high-speed rail and rail transit will definitely also drop. This is definitely not good news for companies that are preparing to produce aluminum profiles for high-speed rail cars. Some private companies that have spent a lot of money on industrial aluminum production lines are especially miserable.    In order to balance production capacity, it is necessary to continuously improve the quality of domestic aluminum processing materials, enrich their varieties, improve their application value, and expand the use range of aluminum profiles. According to Director Lang of the Aluminum Branch of the Non-Ferrous Metals Industry Association, industrial aluminum has a wide range of uses in trucks, cars, coal carriages, domestically-produced large planes and overpasses. If the supporting facilities and technology are perfect, the production capacity of industrial aluminum There can be no excess. ————The article comes from the Internet. If there is any infringement, please contact to delete it.
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