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1、精品学习资源专业英语论文考核专业年级 机械电子 141姓 名 韦 继 虎学 号 1611140109指导老师 董文彬完成时间2021 年 6 月 10 日欢迎下载精品学习资源ApplicationandDevelopmentofLightweight Material for AutomobileAbstractCar lightweight is an important means to achieve energy-saving emission reduction and methods, in improving the fuel economy and environmental
2、protection has an important role. At present, the lightweight new material is the main way of the current body weight reduction, through the multi-material structure optimization, both to improve vehicle performance, but also significantly reduce the quality. This chapter discusses the performance a
3、nd application of several lightweight materials, describes the development of lightweight materials in the automotive industry and the application of the trendKey words: automotive ； lightweight ； lightweight materials欢迎下载精品学习资源PrefaceThe study oflightweightcar isa mainstream ofmodern car design and
4、 manufacturing. Car lightweight, is to ensure the strength and safety of the car under the premise of the car as much as possible to reduce the quality of the preparation, thereby enhancing the vehicles power, reduce fuel consumption and reduce exhaust pollution. Data show that if the car to reduce
5、the quality of 10%, fuel efficiency can be increased by 6% to 8%, fuel consumption can be reduced by 6% to 10%. Fuel consumption decline, emissions also decreased, while resource utilization increased, extended life of the car, the use of performance has improved significantly. Car body quality acco
6、unts for about 50% of the quality of the vehicle, it is clear that the lightweight body for the vehicle lightweight play a pivotal role 1. At present, the car body weight reduction has two main research directions: First, the use of lightweightmaterials； Second, optimize the structure. Structural op
7、timization potential space has been very small, the gradual use of lightweight new materials is the current body of one of the main means of lightweight.1 New high strength steelIn recent years, with the progress of metallurgical technology, on the basis of high-strength steel, with ultra-lowcarbon
8、as the basic characteristics, and gradually formed with deep drawing, high strength, baking hardening performance of new high- strength steel. At present, the use of high-strength automotive body ismainly sheet metal and pipe. Mainly:1 BH steel bake hardening steel. BH steel plate yield strength in
9、the baking paint increased, without loss of formability under the premise of improving the anti-depression, can reduce the steel plate, mainly for high strength and difficult toform parts, such as roof, Doors, luggage and other components, the main use of tensile strength of 340 390MPa BH steel plat
10、e. 2 RIP steel phase change induced plastic steel. Mainly used for the collision must absorb more energy when the high-strength structural parts, such as body frame. 3 MS steel martensitic欢迎下载精品学习资源phase steel. Used to hit the high impact parts, that is, in a very short collision deformation stroke
11、to absorb a lot of energy, such as side crash protection. 4 boron steel. Used to require high strength and high degree of molding of parts, can minimize the quality. Such as A, B column reinforcement, etc. 2.Practice has proved thatwhen the thickness ofthe steel were reduced 0.05,0.10,0.15 mm, the b
12、odyweightloss were 6%, 12%, 18%. Interms of development trends, the use of new high-strength steel plate in the body is constantly thinning, while the body strength has increased, while increasing the safety of the car, reducing noise and vibration, improve fuel efficiency and reduce the overall qua
13、lity of the car. The cost did not increase, while the acceleration, driving performance has improved. Whether from the cost point of view, or from the performance point of view, the new high-strength steel plate is to meet the lightweight body to improve the safety of the collision of the best mater
14、ials. The proportion of new high-strength steel plates used in various automobile factories is increasing. JapansMitsubishi Pajero SPORT for the companys latest SUV car designed a new body structure, body 70% of the components made of high-strength steel plate, the vehicles torsional stiffness even
15、higher than the Grand Cherokee 45% Body carrying capacity of up to 2t or more. Fords Windstar body frame 60% is high strength steel. Toyotas new Vitz body structure in high-strength steel accounted for 48%, than the companys Starlet car to reduce the quality of 17kg.However, the high strength of the steel sheet is liable to cause a decrease in plasticity, a poor formability, and an increase in yield strength, which causes surface distortion and springback, and increases the shapesinstability. Thus, high strength steel sheets are a difficult to form material. Thermoforming
