Effect of heat treatment and shot peening technology on microstructure and properties of 7A04 aluminum alloy conductive rod

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Xie, Yi^1 ; Li, Wenbo^1 ; Feng, Chao^1 ; Luo, Hongjian^2 ; Qiao, Yaxia^3 ; Zhang, Hao^3

State Grid Hunan Electric Power Company Limited Research Institute, Changsha

410007, China^1

State Grid Zhejiang Electric Power Research Institute, Hangzhou

310014, China^2

China Electric Power Research Institute, Beijing

100192, China^3

关键词: 7a04 aluminum alloys;    After-heat treatment;    Corrosion problems;    Effect of heat treatments;    Effects of heat treatment;    Erosion resistance;    Humid environment;    Microstructure and properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/5/052006/pdf
DOI  :  10.1088/1755-1315/199/5/052006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to study the corrosion problem of 7A04 aluminum alloy conductive rod in humid environment and coastal area, the effects of heat treatment and shot peening technology on the microstructure and erosion resistance of 7A04 alloy were investigated by the optical microscope, scanning electron microscope, transmission electron microscope, portable Vickers hardness tester and peeling test. It was found that the microstructure of the 7A04 aluminum alloy was refined after heat treatment, and the surface hardness reached 170-185 HV. The resistance of alumminum alloy to spalling corrosion was also improved. After the shot peening treatment, the surface grain of the 7A04 aluminum alloy was further refined and the surface micro-hardness was elevated to 200-260 HV. In addition, the anti-flaking corrosion ability was further improved to the optimal PB level. Finally, the on-site detection method of heat treatment and shot peening of 7A04 aluminum alloy conductive rod was proposed.