Research on Homogenization Process of Al-4.14Cu-1.51Li Alloy

Taking self-melting Al-Cu-Li alloy as the research object, the homogenization process of Al-Cu-Li alloy was studied by using scanning electron microscope, metallographic microscope and other instruments. The experimental results show that the as-cast alloy has obvious dendritic structure, and has coarse second phases such as Al₂Cu, Al₂CuMg, etc. After the first level homogenization, the coarse phases are not significantly reduced.In addition, the best secondary homogenization process is 460 ℃/8 h+515 ℃/24 h.At this time, the coarse phases are greatly reduced, and the residues are the AlCu phase as well as the possible Al₂Cu phase and AlCuFeMn gathering collective. After homogenization kinetics verification, the second level homogenization time matches the experimental results.