Technical introduction and development trend of automotive aluminum wheels

as early as the 20th century, the Germans used mould casting to produce car alloy aluminum wheels, the late 1940s in the car application of aluminum wheels, the late 1950s developed the casting of the overall aluminum wheels, the 70's developed countries began to promote the application of aluminum wheels in large quantitiesChina began the production and manufacture of aluminum wheels in the late 1980s, with the total production and sales of more than 7.2 million vehicles in 2006, the world's third largest automobile producer and the world's second largest automobile consumer, China's auto motive sand and motorcycle aluminum wheel annual output of more than 62 million pieces, is the world's largest producer of aluminum wheels, and export sharein order to meet the needs of the use of functions and markets, aluminum wheels in the structure has a whole and multi-piece combination of design; Apply transparent paint, electroplating and other appearance requirements, coating colors have sports silver, fine silver, bright smoke gray, black and other different color requirements, and large-scale, high-strength, lightweight, soft refinement, beautiful and so on is the main development trend and the direction of the design of aluminum wheelsaluminum wheels are used in AlSi series alloys (AlSiMg, AlSi111, AlSi1Mg, AlSi12Mg), Mg alloys, 6061 deformed aluminum alloys, with the largest use (approximately 90%) of The Sr-des moest alloyThe forming process of aluminum wheels includes gravity casting, low-pressure casting, extrusion casting, semi-solid casting, forging, rotary forming and a combination of several processesSqueeze casting and semi-solid casting technology, can improve the material's gold phase organization, improve the mechanical performance of the product, especially suitable for the manufacture of large-size, lightweight aluminum wheels; The rotary pressure process to form, the mechanical properties of the aluminum wheels produced by the process technology, than the same specifications of cast aluminum wheels improved by more than 18%, but also reduce the quality of about 20%, the productised mainly large specifications, lightweight aluminum wheels and racing aluminum wheelsA new lightweight aluminum hub with a new concept, the built-in air aluminum wheel, has recently emerged, further reducing the mass of the hub by 20% through cavity technology