The batch application window of lightweight alumin

The batch application window of automotive lightweight aluminum and magnesium alloys will be opened after 2020

Abstract: with the increasingly stringent global automotive emission regulations, lightweight has become one of the important means for automotive enterprises to achieve energy conservation and emission reduction. Aluminum and magnesium alloys have become excellent lightweight materials for automobiles due to their low density

from March 15 to 16, the "2018 (5th) China Automotive Lightweight Technology - aluminum magnesium light alloy application Cooperation summit" hosted by Beijing Baihui Strategy Information Consulting Co., Ltd. and Shanghai Automotive Group Co., Ltd. was held in Shanghai. At the same time, the "2018 China new energy vehicle core technology and aluminum alloy materials for battery and motor" was also held. The theme of this conference is "aluminum magnesium light alloy helps automobile lightweight". More than 200 representatives from SAIC Group, BAIC, FAW, GAC, Chang'an Automobile, Zhongtai automobile, Huizhong automobile, Changjiang automobile, Weilai automobile, cheetah automobile, Honda Automobile and other automobile manufacturers, parts manufacturers and non-ferrous metal raw material production and research units gathered together to discuss the recent development of automotive lightweight aluminum and magnesium applications, automotive lightweight solutions There were intense discussions and in-depth exchanges on hot issues such as the cooperation and docking of enterprises in the automotive lightweight industry chain

"double points" policy promotes the development of automobile lightweight

with the increasingly stringent global automobile emission regulations, lightweight has become one of the important means for automobile enterprises to achieve energy conservation and emission reduction. Aluminum and magnesium alloys have become excellent lightweight materials for automobiles due to their low density. Among them, the application of aluminum alloy in the automotive field has also developed rapidly because of its good deformation processability, casting and forging properties, machinability, good corrosion resistance, surface treatability and recyclability

according to the road map of energy saving and new energy vehicle technology released by the Chinese government in November 2017, the aluminum targets for single vehicle use in China are: 190kg by 2020, 250kg by 2015, and 350kg by 2030; The goal of magnesium for single vehicle is to reach 15kg by 2020, 25kg by 2015, and 45kg by 2030. The total market value of plastic flexible packaging in the Middle East and Africa is $4billion. In the future, aluminum and magnesium for automobiles will have great development space

in addition, on September 28, 2017, the Ministry of industry and information technology, the Ministry of Finance and other five ministries and commissions jointly announced the "measures for the parallel management of average fuel consumption and new energy vehicle credits of passenger vehicle enterprises", proposing that in the future, the fuel consumption credits and new energy vehicle credits of enterprises will be managed in parallel, and automobile manufacturers need to reduce fuel consumption to obtain positive fuel consumption credits, A sufficient number of new energy vehicles must also be sold in order to obtain the corresponding new energy points

this means that in order to meet the market requirements of double points, car companies need to further promote lightweight technology in terms of traditional fuel consumption and improve the energy-saving and emission reduction technology of traditional engines; At the same time, we also need to increase the output of new energy vehicles. For new energy vehicles, material lightweight is an important way to improve the mileage of new energy vehicles without innovative development of battery technology. Research shows that the weight is reduced by 10%, and the mileage of new energy vehicles can be increased by 5.5%. Therefore, new energy vehicles have more urgent requirements for lightweight, which will further promote the application of lightweight technology in vehicle enterprises

"The goal of automobile lightweight has been made clear, and aluminum and magnesium alloys will be the mainstream materials for automobile lightweight in the future. The Aluminization rate of passenger cars' body four doors and two covers, bumpers, crash beams, heat exchange systems, chassis systems, power battery boxes, and motor housing components will be significantly increased. In 2020, as long as the specified core rod diameter is met and has sufficient hardness, automobile lightweight materials will open the time for batch application of aluminum and magnesium alloys Window. " Wangdengwen, general manager of Beijing Baihui Strategy Information Consulting Co., Ltd., said in his speech at the conference

the whole industry chain cooperates to promote the application of magnesium alloy components

compared with aluminum alloy, magnesium alloy is lighter, and the weight of magnesium is only 22% of iron and 66% of aluminum. At the same time, magnesium alloy has the highest relative strength, the specific stiffness is close to aluminum alloy and steel, far higher than engineering plastics, has good seismic and noise reduction performance, and has electromagnetic shielding and other characteristics

although the weight reduction effect is better, the consumption of magnesium alloy increases slowly. "At present, the difficulties restricting the batch application of magnesium alloys lie in the corrosion of magnesium alloys, the development of low-cost and high-performance magnesium alloys, the connection between magnesium alloys and heterogeneous materials, the high scrap rate of magnesium alloy die-casting parts, and the poor deformation and processing of magnesium alloys, which need to be solved urgently." Dr. Deng Yanjun of Chongqing Chang'an Automobile Co., Ltd. pointed out in his speech

there are many introductions to the experience and calculation formula of the relationship between the surface roughness of the parts of the experimental machine and the dimensional tolerance of the parts of the experimental machine. As for the problem of the high cost of magnesium alloy, the double deputy general manager of Zha Jian of Chongqing Boao magnesium aluminum metal manufacturing Co., Ltd. said that due to the high unit price of magnesium alloy and the low integration of the original magnesium alloy material production enterprises with the automobile factory, some 5 The price of magnesium alloy parts is on the high side due to excessive design in experimental projects. However, he pointed out that at present, the cost can be reduced through close contact with automobile manufacturers and early design and process optimization

although there are still some problems to be solved, the application prospect of magnesium alloy in the automotive field is still promising. According to the "energy saving and new energy vehicle technology roadmap", the consumption target of magnesium alloy per vehicle in 2030 is 45kg. According to statistics, in 2016, the average consumption of magnesium alloy for vehicles in China was only about 3kg. Magnesium alloy has a broad market and unlimited potential in the future automotive lightweight application

Deng Yanjun said that based on the urgent need for lightweight of traditional vehicles, especially new energy vehicles, magnesium alloy has obvious advantages, and its consumption in vehicles will gradually increase. She revealed that at present, the magnesium alloy steering wheel framework has achieved mass production in Chang'an automobile. Among the new energy vehicles that Chang'an automobile is planning, the magnesium alloy steering support and seat framework will be applied in batches in the future

Deng Yanjun suggested that magnesium alloy is one of the ideal lightweight materials for automobiles. In order to promote the application of magnesium alloy in automobiles, automobile OEMs should closely contact magnesium alloy parts manufacturers, raw material suppliers and research institutions to promote the application of magnesium alloy parts from the whole industrial chain

multi material hybrid body is the future development direction

the application proportion of aluminum and magnesium will rise

in the selection of lightweight materials, "the right materials are used in the right place through the right process" is a sentence most emphasized by many automobile host manufacturers at the meeting

Jin quanjun, senior manager of Zhejiang Zhongtai New Energy Automobile Co., Ltd., said that for automobile lightweight, automobile OEMs should consider reducing the weight of automobile products as much as possible on the premise of ensuring the comprehensive performance indicators of automobiles, so as to achieve the comprehensive indicators of weight reduction, energy conservation, emission reduction and safety. At the same time, they should also ensure the safety, crashworthiness, shock resistance and comfort of automobiles, and the automobile cost will not be significantly increased

Xiongfei, deputy general manager of Hangzhou Changjiang Automobile Co., Ltd., believes that aluminum alloy is a very excellent lightweight material in the future. At the market level, "all aluminum" is the gold lettered signboard, but the application of aluminum alloy in car body is also facing the challenge of high-strength steel, composite materials and other materials

Ni Lei, senior manager of the passenger car company of Shanghai Automotive Group Co., Ltd., also said that although aluminum alloy is a very promising lightweight material, for car enterprises, efficiency is an important factor for enterprises to consider, and aluminum alloy enterprises need to further reduce costs

as for the development of body materials in the future, automobile host manufacturers generally believe that multi-material hybrid body will be the future development direction. "Hybrid material body takes into account the needs of lightweight, processability, safety, cost and other aspects. In the future, the materials of automobile body must be hybrid material body with aluminum alloy, magnesium alloy, high-strength steel, composite materials and other materials." Dr. Liu Jiancai, Automotive Engineering Research Institute of GAC Motor Group Co., Ltd., said in his speech

as for the application of excellent lightweight materials such as aluminum and magnesium, delegates at the meeting generally believed that with the recycling and recycling of aluminum and magnesium materials through a single alloy, the improvement of yield and the quantitative application of main engine plants, their application proportion in automotive lightweight materials will increase significantly

lightweight has become an inevitable trend in the development of the automotive industry. Automotive manufacturing enterprises have integrated lightweight work into the product research and development process, but the development and application of lightweight technology only rely on vehicle enterprises is not enough. It also requires the joint efforts of parts manufacturing enterprises, basic raw materials enterprises, research institutions, and the cooperation of upstream and downstream of the industrial chain. It is believed that with the implementation of the fifth stage of fuel consumption, the implementation of the "double integral" policy and the development of new energy vehicles, it will bring further driving force to the lightweight of vehicles and promote the new development and application of lightweight materials such as aluminum and magnesium alloys