研究ZL107铝合金经过固溶和时效处理后的Si相形态演化及其对力学性能的影响。结果表明,当合金在560°C固溶处理6h后,有部分Si相固溶进入基体,但在随后的时效过程中Si相会重新析出。比较了变质和未变质ZL107合金的固溶时效过程。通过La变质处理再固溶时效,ZL107合金中的Si相形态明显细化,合金的力学性能提高幅度更大。 The evolution of Si phase morphology and its effect on mechanical properties of ZL107 aluminum alloy after solution treatment and aging treatment were studied. The results show that when the alloy is treated at 560 ° C for 6h, some of the Si phase dissolves into the matrix, but the Si phase will be re-precipitated during the subsequent aging. Comparing the solution aging process of metamorphic and unmodified ZL107 alloy. After aging treatment by aging, the phase morphology of Si in ZL107 alloy is obviously refined, and the mechanical properties of the alloy are greatly improved.