(中南工业大学 粉末冶金国家重点实验室， 长沙 410083)
摘 要: 研究了升温固溶处理对提高7075和2024铝合金的结晶相固溶程度和力学性能的影响。升温固溶可使最终固溶温度超过多相共晶温度而不产生过烧组织，提高结晶相固溶程度。7075合金的结晶相较2024合金的易于固溶。两种合金的力学性能与固溶程度密切相关。强化固溶的7075合金强度提高约20%，断裂和屈服强度可达660 MPa和606 MPa，其性能提高的幅度大于强化固溶的2024合金。
关键字: 铝合金； 热处理； 固溶； 力学性能； 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
