本研究以差示掃描量熱儀(DSC)、電子微探儀(FE-EPMA)、光學顯微鏡(OM)、導電度量測(%IACS)、電子顯微鏡(TEM、SEM-EBSD)等分析Al-4.9Cu-1.2Mg (AA2024)高強度鋁合金微結構,並以硬度及拉伸試驗,探討微量鋯與均質化對T4態AA2024鋁合金微結構與機械性質之影響。;Using the differential scanning calorimetry (DSC), the electron probe X-ray micro-analyzer (FE-EPMA), the optical microscope (OM), the electrical conductivity meter (% IACS), the electron microscope (TEM, SEM-EBSD), tensile test and hardness test to analyze the microstructure and mechanical properties of the alloys. In order to discuss the effect of minor Zr and homogenization on the microstructure and mechanical properties of the T4 state of Al-4.9Cu-1.2Mg (AA2024) alloys.