High-strength aluminum alloy excellent in performance and preparing method thereof

• Main Authors: XU ZHENGBING, YANG JIANBING, LI YITAI, ZHAN YONGZHONG, YANG WENCHAO, HU ZHILIU, ZHAO YANJUN, PANG XINGZHI
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2017
• 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 discloses a high-strength aluminum alloy excellent in performance and a preparing method thereof. Elements of Ho and Zr are added into the Al-Zn-Mg-Cu series high-strength aluminum alloy at the same time, and through process steps of burdening, smelting, casting, uniform annealing treatment, solid solution treatment and the like, the Al-Zn-Mg-Cu-Ho-Zr high-strength aluminum alloy with the excellent performance is prepared. The alloy is composed of chemical components including, by weight percent, 6% of Zn, 2.5% of Mg, 1.6% of Cu, 0.5% of Ho, 0.1 to 0.3% of Zr and the balance Al. Due to combination of the purification effect of Ho and the grain refining effect of Zr, the Al-Zn-Mg-Cu alloy structure is obviously refined, impurities are reduced, and the grain boundary is purified; through the uniform annealing treatment and solid solution treatment, the alloy tensile strength is effectively improved, and the alloy comprehensive mechanical property is obviously improved. 本发明公开了种性能优异的高强铝合金及其制备方法，往Al-