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研究了不同热处理和变形工艺对铝合金组织、硬度和电导率的影响。结果表明,时效温度为170℃和190℃时铝合金的硬度峰值时间相对150℃有所提前;随着时效时间延长,变形后铝合金的电导率表现为开始阶段逐渐升高而随后保持稳定;不同时效时间下合金的电导率都大于冷变形态合金;适宜的均匀化退火温度为530℃,可以有效改善铝合金的偏析,且能使粗大的第二相回溶至基体而不产生过烧现象;铝合金适宜的固溶制度为500℃保温1 h,适宜的时效热处理制度为170℃保温7 h。
The effects of different heat treatment and deformation processes on the microstructure, hardness and electrical conductivity of aluminum alloy were studied. The results show that the hardness of aluminum alloy is earlier than 150 ℃ when the aging temperature is 170 ℃ and 190 ℃. With the aging time, the electrical conductivity of the deformed aluminum alloy gradually increases from the initial stage and then remains stable. The conductivity of the alloy under different aging time is greater than that of the cold-deformed alloy. The suitable homogenization annealing temperature is 530 ℃, which can effectively improve the segregation of the aluminum alloy and make the coarse second phase remelted to the matrix without over-burning Phenomenon; aluminum alloy suitable solution system 500 ℃ insulation 1 h, suitable aging heat treatment system for 170 ℃ heat 7 h.