一、铝和交通运输当前交通运输业正朝着安全、高速、节能、环保、高效、高性价比和舒适美观的方向发展。要实现上述目标的根本出路在于运载工具的轻量化。第一次世界大战以来,铝材以仅为钢铁密度的近1/3(2.7g/cm3)、轻而强的力学性能及易加工成材的特性,先后成为航空、航天工业 I. Aluminum and Transportation The current transportation industry is moving in the direction of safety, high speed, energy conservation, environmental protection, high efficiency, high cost performance and comfortable appearance. The fundamental way to achieve these goals is to reduce the weight of vehicles. Since World War I, aluminum has been used only in the aerospace and aerospace industries for nearly 1/3 (2.7 g / cm3) of steel density, light and strong mechanical properties and ease of processing.