【摘要】 为探究Be在固溶处理过程中对含铁相转变的影响，设计了Be与不同固溶处理工艺结合的系列实验，并深入研究了其对共晶硅、含铁相形貌的影响与力学性能间的内在联系，以期全面提升亚共晶Al-Si-Mg合金整体性能。结果表明，Be延缓了Mg₂Si相的分解，促进了π-AlSiMgFe相向β-AlFeSi相的转变。π-AlSiMgFe相结构形貌的加速转变在提升强化效果的同时，也减弱了π-AlSiMgFe相对基体的割裂作用，进而同步提升合金的强塑性。更多还原

【Abstract】 To investigate the effect of Be on the transformation of Fe-containing phases during solution treatment, a series of experiments combining Be with different solution treatment processes were designed, and the intrinsic relationship between its effect on the morphology of eutectic silicon and Fe-containing phases and the mechanical properties was studied, aiming to improve the overall performance of the hypoeutectic Al-Si-Mg alloy. The results show that Be delays the decomposition of Mg₂Si phase and promotes the transformation of π-AlSiMgFe phase to β-AlFeSi phase. The accelerated transformation of the structure and morphology of π-AlSiMgFe phase not only enhances the strengthening effect, but also weakens the cleavage effect of π-AlSiMgFe phase on the matrix, thus synchronously improving the strength and plasticity of the alloy.更多还原