Zr与时效处理工艺对Al-Zn-Mg-Cu合金组织与性能的影响  

The effect of Zr and aging process on the microstructure of Al-Zn-Mg-Cu alloy impact of performance

作　　者：林玉金 夏鹏 周楠 胡权 Lin Yujin;Xia Peng;Zhou Nan;Hu Quan(Foshan Sanshui Fenglv Aluminum Co.,Ltd.,Foshan 528133;Institute of Advanced Materials,Guangdong Academy of Sciences,Guangzhou 510650,China)

机构地区：[1]佛山市三水凤铝铝业有限公司,佛山528133 [2]广东省科学院新材料研究所,广州510650

出　　处：《铝加工》2022年第6期45-50,共6页Aluminium Fabrication

基　　金：广东省基础与应用基础研究基金项目(2020B1515120093)。

摘　　要：采用TEM、电化学工作站、慢应变速率拉伸机等方法研究了添加微量Zr元素以及T6 (时效)、RRA (回归再时效)、FSA (四级时效)等不同热处理工艺对Al-Zn-Mg-Cu合金微观组织、力学性能与应力腐蚀性能的影响。结果表明,Al-ZnMg-Cu合金经Zr微合金化后,力学性能、抗应力腐蚀性能均得到明显提升,T6处理可获得最优的力学性能,经RRA和FSA处理后可进一步提升材料的抗应力腐蚀性能。The effects of adding trace Zr and different heat treatment processes such as T6(aging), RRA(regression re-aging) and FSA(four-stage aging) on microstructure, mechanical properties and stress corrosion properties of Al-Zn-Mg-Cu alloy were investigated by TEM, electrochemical workstation and slow strain rate tensioning machine. The results show that the mechanical properties and stress-corrosion resistance of Al-Zn-Mg-Cu alloy are obviously improved after Zr microalloying, and the optimal mechanical properties can be obtained by T6 treatment. The stress-corrosion resistance of Al-Zn-Mg-Cu alloy is further improved by RRA and FSA treatment.

关 键 词：AL-ZN-MG-CU合金 Zr微合金化 微观组织 抗应力腐蚀性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]