| 摘要 |
The invention relates to an extruded product made of an aluminium-based alloy comprising 4.2% to 4.8% by weight of Cu, 0.9% to 1.1% by weight of Li, 0.15% to 0.25% by weight of Ag, 0.2% to 0.6% by weight of Mg, 0.07% to 0.15% by weight of Zr, 0.2% to 0.6% by weight of Mn, 0.01% to 0.15% by weight of Ti, an amount of Zn of less than 0.2% by weight, an amount of Fe and of Si of less than or equal to 0.1% by weight each, and inevitable impurities at a content of less than or equal to 0.05% by weight each and 0.15% by weight in total. The sections according to the invention are particularly useful as fuselage stringer or stiffener, fuselage frame, wing stiffener, floor beam or section or seat track, especially due to their improved properties compared to those of known products, in particular in terms of energy absorption during an impact; static mechanical strength and corrosion resistance properties, and their low density. |
