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研究了分级时效工艺参数对Ａｌ－１．９Ｌｉ－２．３３Ｃｕ－０．０９Ｚｒ－０．１１Ｃｅ合金拉伸性能及强化相分布的影响。结果表明，预时效温度对性能影响不显著；随终时效温度升高，强度先升高而后下降，塑性则一直下降；强度随终时效时间延长而上升。预时效及终时效温度偏低或终时效时间偏短均不利于δ＇相的析出，但易使Ｔ_１相直接由α基体上沉淀，并呈细小、弥散分布；预时效或终时效温度偏高时，易使δ＇相粗化并向Ｔ_１相转变，而且会造成Ｔ_１相的粗化及沿晶析出；长时间终时效仅使δ＇相粗化但不会使Ｔ_１相粗化。合适的分级时效可促成强化相的合理分布，从而产生比较明显的沉淀强化。
The effect of aging process parameters on tensile properties and strengthening phase distribution of Al-1.9Li-2.33Cu-0.09Zr-0.11Ce alloy was studied. The results show that the pre-aging temperature has no significant effect on the performance. With the increase of the final aging temperature, the strength first increases and then decreases, while the plasticity decreases continuously. The strength increases with the increase of the final aging time. The pre-aging and final aging temperature is low or the final aging time is short is not conducive to the precipitation of δ ’phase, but easy to T_1 phase precipitated directly from the α matrix, and was small, diffuse distribution; pre-aging or end-time high temperature , It is easy to make the δ ’coarsening and transition to the T_1 phase, and it will cause the coarsening and intergranular precipitation of the T_1 phase. The long aging will only make the δ’ coarsening but will not coarsen the T_1 phase. Appropriate classification aging can promote the rational distribution of strengthening phase, resulting in more obvious precipitation hardening.