(中南工業(yè)大學 粉末冶金國家重點實驗室， 長沙 410083)
摘 要: 研究了升溫固溶處理對提高7075和2024鋁合金的結晶相固溶程度和力學性能的影響。升溫固溶可使最終固溶溫度超過多相共晶溫度而不產生過燒組織，提高結晶相固溶程度。7075合金的結晶相較2024合金的易于固溶。兩種合金的力學性能與固溶程度密切相關。強化固溶的7075合金強度提高約20%，斷裂和屈服強度可達660 MPa和606 MPa，其性能提高的幅度大于強化固溶的2024合金。
關鍵字: 鋁合金； 熱處理； 固溶； 力學性能； 第二相
（State Key Laboratory for Powder Metallurgy, Central South University of Technology, Changsha 410083, P.R.China）
Abstract:The effects of enhanced solution of second phases on the microstructureand mechanical properties of alloys 7075 and 2024 were studied. The results show that the temperatureincremental solution treatment can make the final solutiontemperature higher than the multiphase eutectic temperature without the formationof overheated microstructure, and improve the second phase solution. In contrastto alloy 2024, the second phases in alloy 7075 can dissolve more completely. The mechanical properties of these two alloys depend considerably on the second phase solution. By incrementalsolution treatment, the ultimate tensile strength and yield strength of 7075 alloys can be raised about 20%, to 660 MPa and 606 MPa respectivel
Key words: aluminum alloy; heat treatment; enhanced solution; mechanical properties; second phases
