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含锂的铝合金因轻量且具有良好的断裂韧性,作为飞机用结构材料正引人注目。但与传统的2024.7075合金一样,为获得高强度需从固溶化处理温度下进行水冷等急冷,这容易使材料产生断裂变形,从而需要矫正等工序。为克服以上问题,宇野照生等发明了可获得高强度的淬火性优良的 Al-Cu-Mg-Li 系铝合金材料的制造方法,其工艺过程如下:将合金组分(0.5～3.0wt%cu、0.5～4.0Wt%Mg、1.0～4.0Wt%Li,其余为 Al 以及不可避免的杂质 Si.Fe.Ti.B.Be)在氩气中熔化、铸造,将铸锭在氩气中于520℃下进行8h 的均质化处理后,热轧至厚为 6mm。
Lithium-containing aluminum alloy is attracting attention as a structural material for aircraft due to its light weight and good fracture toughness. However, as with the conventional 2024.7075 alloy, quenching such as water cooling from the solution treatment temperature to achieve high strength easily results in fracture and deformation of the material and requires a process such as correction. In order to overcome the above problems and to create a high-strength Al-Cu-Mg-Li-based aluminum alloy material having high hardenability, Ueno Photonics et al. Have invented a process for producing an Al-Cu- Cu, 0.5 to 4.0 wt% Mg, 1.0 to 4.0 wt% Li, balance aluminum and unavoidable impurities Si.Fe.Ti.B.Be) is melted in argon, cast, and the ingot is heated in argon at The homogenization was performed at 520 ° C for 8 hours and then hot-rolled to a thickness of 6 mm.