热处理工艺对6061铝合金硬度和导电率的影响

Effect of heat treatment process on hardness and conductivity of 6061 aluminum alloy

研究了热处理工艺对6061铝合金硬度和电导率的影响。结果表明:固溶处理过程中,随着固溶时间的增加,合金硬度先降低后升高,后又逐渐降低,随着固溶温度的增加,显微硬度值逐渐增大;时效过程中,硬度值随时效时间增加先升高后降低,电导率随时效时间增加逐渐升高并趋于稳定;6061铝合金最佳的热处理制度为540℃固溶4 h+173℃时效11 h,此时合金的硬度值为119.74 HV6,电导率为56%·IACS;对合金电导率影响最大的参数是固溶温度和时效时间,对硬度值影响最大的参数是时效时间。

The effect of heat treatment on hardness and conductivity of 6061 aluminum alloy was studied. The results show that in the process of solution treatment, with the increase of solution time, the hardness of the alloy first decreases then increases and last decreases gradually, and the hardness increases gradually with the increase of solution temperature. In the process of aging treatment, with the increase of aging time, the hardness of the alloy increases first and then decreases, and the conductivity of the alloy increases gradually and tends to be stable. The best heat treatment system for the 6061 aluminum alloy is solution at 540 ℃ for 4 h and then aging at 173 ℃ for 11 h, and the hardness of the alloy is 119.74 HV6, the conductivity is 56 %·IACS. The most important parameters affecting the conductivity of the alloy are the solution temperature and aging time, and the aging time is the most important parameter affecting the hardness of the alloy.