702A铝合金的合金化工艺研究

Study on Alloying Technology of 702A Aluminum Alloy

为了提高702A铝合金的强韧性,通过正交实验法以及控制熔炼工艺,确定702A合金最优化成分为(质量分数,%):7Si,0.5Mg,0.1Mn,1.5Cu,经固溶处理和时效处理后,其力学性能能达到:σ≥350MPa,δ≥5%。

In order to improve strength and toughness of 702A aluminum alloy, through orthogonal experiment and control of melting process, the determined alloy composition is （wt%） 7Si, 0.5Mg, 0.1Mn, 1.5Cu. After the solution heat treatment and aging treatment, the mechanical properties of 702A aluminum alloy achieve ？