一、概述 轻金属铸件特别是铝合金铸件已广泛应用于制造宇航飞行器的零件,如电子仪器舱、燃料贮箱、泵体、设备支架等。近年来,出于对飞行器性能提出了更高的要求,各国宇航部门都在积极寻找各种途径来减轻飞行器的重量,降低制造成本,这就使轻金属铸件的应用范围更加扩大了。 First, an overview of light metal castings, especially aluminum alloy castings have been widely used in the manufacture of aerospace vehicle parts, such as electronic equipment, fuel tanks, pumps, equipment and other support. In recent years, due to the higher requirements on the performance of the aircraft, aerospace departments in various countries are actively looking for ways to reduce the weight of the aircraft and reduce the manufacturing cost, which further expands the application range of light metal castings.