全球汽车工业越来越注重汽车的轻量化 ,运用铝、镁、钛等轻合金取代笨重的钢板已成为各汽车制造厂的目标。轻量化不但可以提高汽车本身的速度 ,还能降低油耗 ,减少废气排放量和改善安全性 (缩短刹车距离和减少碰撞惯性 )。近两年 ,全铝打造的概念车 ,甚至是批量生产的全铝车已 The global automotive industry is increasingly focusing on the lightweighting of automobiles. The use of light alloys such as aluminum, magnesium, and titanium to replace bulky steel plates has become the goal of automakers. Lighter weight can not only increase the speed of the car itself, but also reduce fuel consumption, reduce exhaust emissions and improve safety (shorten braking distance and reduce collision inertia). In the past two years, the concept car made of aluminum has even been produced in batches.