为了满足航空和宇航对先进技术的潜在需要,研制了用车间的装备就能机械加工的新合金。它们比与之竞争的材料,如传统的铝合金更便宜,有些更轻巧。新的铝-锂合金由于密度低,重量比常规的铝合金低5～10%。波音公司声称,计划在5～7年内,用这种合金取代飞机结构件。这将减少飞机 In order to meet the potential needs of advanced aerospace and aerospace technologies, new alloys machined with plant equipment were developed. They are cheaper and more lightweight than competing materials like traditional aluminum alloys. The new aluminum-lithium alloys, due to their low density, weigh 5 to 10% less than conventional aluminum alloys. Boeing claims it plans to replace aircraft structures with this alloy in five to seven years. This will reduce the plane