空间技术对结构材料的性能要求,可举出:①高比强;②可靠性;③耐用性等。这几项要求对一般机械、设备也具有同样重要意义,用于空间则要求更高、更严。空间技术在材料的种类方面并没有特别的局限性,目前应用的主要金属材料有:铝合金、镁合金、钛合金、不锈钢、合金钢以及铜合金等常用金属材料。其中铝合金用得最多。近年 Space technology performance requirements for structural materials, can be cited: ① high specific strength; ② reliability; ③ durability and so on. These requirements on the general machinery, equipment is also of equal significance, for the space is more demanding, more stringent. There are no special limitations on the types of materials used in space technology. The main metal materials currently used include aluminum alloys, magnesium alloys, titanium alloys, stainless steels, alloy steels and copper alloys. One of the most used aluminum. in recent years