采用差示扫描量热法(DSC),在不同加热速率下研究7150 Al-Zn-Mg合金在水淬、自然时效和人工时效状态下的固态反应。DSC曲线上不同的放热和吸热峰对应着不同的固态反应阶段。随着加热速率的增加,各个峰位对应的温度也随之增加,表明这些固态反应是热力学活化和动力学控制的。通过测量不同时效时间下合金的硬度来评估合金的时效行为。通过分析DSC曲线各个峰位对应的热流,得到了合金固态反应的相变分数(Y)、相变速率(dY/dt)、相变函数(f(Y))和动力学参数(活化能Q、频率因子k0)。结果表明:所得到的这些动力学参数与已有文献所报道的结果吻合较好。 Differential scanning calorimetry (DSC) was used to study the solid state reaction of 7150 Al-Zn-Mg alloy under water quenching, natural aging and artificial aging at different heating rates. The different exothermic and endothermic peaks on the DSC curve correspond to different solid-state reaction stages. As the heating rate increases, the temperature corresponding to each peak position also increases, indicating that these solid state reactions are thermodynamically activated and kinetic controlled. The aging behavior of the alloy was evaluated by measuring the hardness of the alloy at different aging times. The phase transformation (Y), phase transition rate (dY / dt), phase transition (f (Y)) and kinetic parameters (activation energy Q , Frequency factor k0). The results show that these kinetic parameters obtained are in good agreement with those reported in the literature.