CP276铝—锂合金的固液温度研究

探讨了固溶温度对CP276铝-锂合金显微组织和力学性能的影响，研究证明，提高固溶温度可以促进Ci、Li原子向基体溶解，进而提高合金时效的沉淀强化效果，并且发现，该合金经固溶处理后可得到未完全再结晶组织，这种微观组织将对基体产生“组织强化效应”，随着固溶温度升高，合金的再结晶程度也有所增加，从而使组织强化效应受到削弱，力学性能测定结果显示，CP276合金的理想固溶温度为530℃左右。

Study on Solid Solution Treatment Temperature for Al-Li Alloy CP276

The effect of solid solution treatment (SST) temperature on the microstructure and mechanical properties for aluminium-lithium alloy CP276 was experimentally explored. It is verified that the increasing of SST temperature promoted the dissolving of Cu, Li atoms to solid solution matrix, and hence improved the ageing strengthening effect upon the alloy. It is also found that, incompletely recrystallized structure could be obtained after solid solution treatment, which helpfully providing "structure-strengthening effect" for this alloy. However, the recrystallization degree improved along with the increasing of SST temperature, making the structure-strengthening effect somewhat weakened. The results of mechanical tensile tests show the desirable SST temperature for alloy CP276 is about 530 ℃.