研究退火温度高达650°C的循环退火对Zr含量高达0.5%(质量分数)的热轧Al合金板的比电导率和硬度的影响。相图成分计算和扫描电镜、透射电镜、电子显微探针分析结果表明,Al板的电导率取决于Al固溶体中的Zr含量,在450°C退火3 h时,Al固溶体中的Zr含量最低。另一方面,合金板的硬度主要取决于L12(Al3Zr)相纳米颗粒的数量。在450°C退火一定的时间可得到最好的电导率和硬度值。 The effects of cyclic annealing at annealing temperatures up to 650 ° C on specific conductivity and hardness of hot-rolled Al alloy sheets with Zr content as high as 0.5% (mass fraction) were investigated. The results of phase composition calculation, scanning electron microscopy, transmission electron microscopy and electron microprobe analysis show that the conductivity of Al plate depends on the Zr content in Al solid solution. When annealed at 450 ° C for 3 h, the Zr content in Al solid solution is the lowest . On the other hand, the hardness of the alloy plate mainly depends on the amount of L12 (Al3Zr) phase nano-particles. Annealing at 450 ° C for a certain amount of time gives the best conductivity and hardness values.