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美国专利US5863359本发明推荐一种有非再结晶组织的轧制厚板(8.0~55.9mm)及挤压型材用铝合金,用于制造喷气式客机结构件中的下蒙皮、纵桁和侧壁。该合金含成分如下(质量分数,%):Cu3.6~4.0、Mg1.0~1.6、Mn0.3~0.7、Zr0.05~0.25、Fe≤0.05、Si0.03。其特点是强度性能(σ0.2>420MPa)、断裂韧性和变形抗力优良。该专利还介绍了具有非再结晶组织热轧(400℃)厚板的生产工艺和热处理制度(淬火和时效)。
US Pat. No. 5,863,359 The present invention proposes a rolled plate (8.0-55.9 mm) with non-recrystallized microstructure and an aluminum alloy for extruded profiles for the manufacture of lower skins, stringers, and flanks in passenger aircraft structural members wall. The alloy contains the following components (mass fraction,%): Cu 3.6 ~ 4.0, Mg 1.0 ~ 1.6, Mn 0.3 ~ 0.7, Zr 0.05 ~ 0.25, Fe≤ 0.05, Si 0.03. It is characterized by strength properties (σ0.2> 420MPa), excellent fracture toughness and deformation resistance. The patent also describes the production process and heat treatment regime (quenching and aging) of a hot rolled (400 ° C) slab with non-recrystallized microstructure.