利用电阻法研究了单独或同时添加微量元素Mn、Cu和Zr等对Al-Zn-Mg合金时效动力学的影响,结果表明:Mn、Cu和Zr都不同程度地推迟了GP区的形成过程,即延迟GP区的形成速度。并且判定:Cu参加GP区的形核过程;Mn可能参加GP区的形核过程;而Zr不参加GP区的形核过程,但固溶处理时形成的含Zr微细析出物在时效时可能起GP区的核心作用。 The influence of the addition of trace elements such as Mn, Cu and Zr on the aging kinetics of Al-Zn-Mg alloys was studied by resistance method. The results showed that Mn, Cu and Zr all delayed the formation of GP zone to some extent, Ie delaying the rate of GP zone formation. And it is concluded that Cu participates in the nucleation process of GP zone, Mn may participate in the nucleation process of GP zone, while Zr does not participate in the nucleation process of GP zone. However, the Zr-containing micro-precipitates formed during solution treatment may play a role of GP The core role of the district.