Corrosion-resistant aluminum alloy for aviation and preparation method thereof

• Main Authors: ZHAO QIZHONG, YAO XIANG, QIN QIUHUI, ZHU YUTAO, ZHENG XU, TAN ZIMENG, HE KEZHUN, WANG HUACHUN, JIA GUILONG, PENG FEI
• Format: Patent
• Language: Chinese; English
• Published: 17.07.2020
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of nonferrous metal processing, and discloses a corrosion-resistant aluminum alloy for aviation and a preparation method thereof. The corrosion-resistant aluminum alloy for aviation is characterized in that reasonable component ratio is provided and compound addition of rare earth elements is achieved through that X equals to 0.08% to 0.25%, X is a mixture of Zr and one or two of Sc and Pr, and compound addition of rare earth elements satisfies the relation of 0.5<=(Sc+Pr)/Zr<=1, so that a supersaturated solid solution is formed in the rapid solidification process of casting; Alx (Zr, Sc, Pr) multi-element dispersed phases which are fine in dispersion and has coherent relationship with a matrix can be more effectively formed in an aluminum alloystructure, the multi-element dispersion phases can effectively inhibit recrystallization of a structure in subsequent hot rolling and solid solution procedures, and the corrosion resistance of the material is improved. Accor