7X75系列铝合金的发展与展望

Review on research progress of 7X75 series aluminum alloys

7X75系列铝合金作为用途最为广泛的超高强度变形铝合金,凭借其超高的强度,良好的断裂韧性和抗应力腐蚀能力,在固溶处理后良好的塑性,良好的热处理强化效果,在航空航天领域的应用占比很大。本文主要综述了7X75系列铝合金的发展进程、研究现状和典型7X75系列铝合金的特点及应用,介绍了7X75系列铝合金的主要热处理工艺以及各类元素在7X75系列铝合金中的主要作用。

As the most widely used ultra⁃high strength wrought aluminum alloy,the 7X75 series aluminum alloy has ultra⁃high strength,good fracture toughness,stress corrosion resistance,plasticity after solution treatment,and heat treatment strengthening effect with high market share in the aerospace field.This article summarizes the development and re⁃search of 7X75 series aluminum alloys,the characteristics and applications of typical 7X75 series aluminum alloys,the main heat treatment processes of 7X75 series aluminum alloys,