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    Home > Coatings News > Paints and Coatings Market > Brief introduction and development trend of automobile aluminum hub Technology

    Brief introduction and development trend of automobile aluminum hub Technology

    • Last Update: 2020-03-05
    • Source: Internet
    • Author: User
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    As early as in the 1920s, the German used sand casting to produce the aluminum wheel hub for racing car In the middle and late 1940s, the German used aluminum wheel hub for car In the late 1950s, the German developed the casting integral aluminum wheel hub Since the 1970s, the developed countries began to promote the application of aluminum wheel hub in large quantities In the late 1980s, China began the production and manufacturing of aluminum hub With the total production and sales of cars in 2006 exceeding 7.2 million, China has become the third largest automobile production country and the second largest automobile consumer country in the world The annual production of aluminum hub of cars and motorcycles in China also exceeds 62 million China is a large aluminum hub production country in the world, and its export share is large In order to meet the use function and market demand, the aluminum hub has integral and multi-component design in structure; in appearance modeling, there are wide, narrow, multi, and few spokes shape design; the appearance style has the appearance requirements of coating, bright surface of spoke car applying transparent paint, polishing, transparent paint, electroplating, etc.; the color of coating includes sports silver, fine silver, bright smoke gray, black, etc The requirements of different colors, such as large-scale, high strength, lightweight, soft and fine, beautiful and so on, are the main development trend and pursuit direction of aluminum hub appearance and structure design Al Si series alloy (AlSi7Mg, alsi11, alsi11mg, alsi12mg), Mg alloy and 6061 deformed aluminum alloy are used for the aluminum hub, among which the amount of Al Si 7Mg alloy modified by SR is the largest (about 90%) The forming process of aluminum hub includes gravity casting, low pressure casting, squeeze casting, semi-solid casting, forging, spinning forming and combination of several processes Squeeze casting and semi-solid casting technology can improve the metallographic structure of materials and improve the mechanical properties of products, especially suitable for manufacturing large-scale, lightweight aluminum hub; spinning forming technology is a plastic deformation processing technology developed on the basis of hot forging technology, aluminum hub is formed by spinning technology after forging billet, and the mechanical properties of aluminum hub produced by technology Yes, it is 18% higher than the cast aluminum wheel hub of the same specification, and can reduce the quality by about 20% The main products are large specification, lightweight aluminum wheel hub and racing aluminum wheel hub Recently, a new concept of lightweight aluminum hub, the built-in air aluminum hub, has emerged Through cavity technology, the mass of the hub is further reduced by 20%.
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