Multi-materials: Automotive lightweight selection

China Coatings Online News Information:
materials or automotive lightweighting is an inevitable choice. Mtableti-Material is a technology that combines a wide range of materials in the automotive body, especially those that combine lightweight materials such as aluminum, magnesium and CFRP (carbon fiber-reinforced composites) in addition to the original steel materials. If a variety of materials are used appropriately in different locations, the body weight can be significantly reduced compared to the use of steel alone. This technology requires the challenge of the cost of lightweight materials. The raw material cost of lightweight materials is often higher than that of steel, and if ordinary welding methods are used like welding steel materials, it is not possible to weld heterogeneic materials. To assemble the body with exotic materials, special welding techniques need to be developed and new equipment investments are required for factory production lines. As a result, multi-materialization technology was previously used only in a part of high-end vehicles. Statistics show that for every 10% weight loss, the fuel efficiency can be increased by 6 to 8%. The weight loss effect of composite materials such as magnesium alloy and carbon fiber is obvious.
the global automotive industry is now stepping up the development of multi-materialization technology, which can improve the efficiency of internal combustion engines and reduce greenhouse gas emissions. By using this technology, the Mercedes-Benz C-Class reduces the weight of the white body (the body before coating) by about 70 kg compared to the previous model. As a result, the combustion efficiency can be increased by up to 30%. In recent years, the use of multi-materialization technology more and more car companies, especially in Europe and the United States manufacturers. In addition to Daimler, BMW launched the EVi3 in Europe in November 2013, with CFRP for most of the body. Ford motor vehicles in the U.S. have an all-aluminum body for the 2015 model year of the F-150, the best-selling pickup model. Jaguar, England. Land Rover launched the XE in Europe in the spring of 2015, with aluminum accounting for about 75% of the car's white body surface area. According to China Coatings Online

, the future of European countries and the United States and other developed countries, as well as emerging market countries will be more stringent emissions regulations.
For example, under EU law, the current cap on CO2 emissions from newly registered vehicles is 130g per kilometre; According to China Coatings Onlineexperts, China allowed automakers to emit 160 grams of CO2 per kilometer in 2015, about 120 grams in 2020 and only 116 grams by 2025. According to the survey, petrol cars will need to be 12 per cent lighter by 2020 than they were in 2014 and 37 per cent lighter by 2030 before the emissions reduction targets set by the US and Europe can be achieved. A combination of factors suggests that it is easier for countries to meet their vehicle lightweight long-term emission reduction targets only through the use of multiple materials. Although the pressure faced by automobile manufacturers is great, there are various shortcomings and constraints in the use of lightweight materials in large areas, but it is the inevitable direction of the future application of automotive materials.
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