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以7056铝合金为研究对象,研究时效温度对合金显微组织、显微硬度、电学性能的影响。结果表明,随着时效温度的增长,铝合金中析出相尺寸逐渐增大,密度逐渐增加,当时效温度由105℃上升到150℃,析出相尺寸由3~5nm增大到4~6 nm。不同时效温度下铝合金的峰值显微硬度几乎相同,约为220 HV。铝合金的电导率随着时效温度的增大而逐渐增大。
With 7056 aluminum alloy as the research object, the effect of aging temperature on the microstructure, microhardness and electrical properties of the alloy was studied. The results show that with the increase of aging temperature, the precipitated phase size gradually increases and the density gradually increases. When the aging temperature rises from 105 ℃ to 150 ℃, the precipitated phase size increases from 3 ~ 5nm to 4 ~ 6nm. The peak microhardness of aluminum alloy at different aging temperatures is almost the same, about 220 HV. The electrical conductivity of aluminum alloy increases with aging temperature.