中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 32 No. 3 March 2022 |
（1. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China;
2. Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China;
3. Hubei Research Center for New Energy & Intelligent Connected Vehicle, Wuhan University of Technology, Wuhan 430070, China;
4. Hubei Engineering Research Center for Green & Precision Material Forming, Wuhan University of Technology, Wuhan 430070, China）
Abstract:A novel forging process of 6082 aluminum alloy is proposed, which can save time and reduce energy consumption while ensuring mechanical properties. In this process, the billet was preforged at solid solution temperature and then preaged, followed by warm forging at 200 °C. The flow behavior of the preaged samples during compression and the mechanical properties of the formed samples were investigated by hot compression tests. The differences in the precipitated phases of the samples with different processing parameters were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and differential scanning calorimetry (DSC). The best comprehensive performance was obtained after preaging at 120 °C for 4 h and holding at 200 °C for 10 min, and the Vickers hardness was HV 128, which was higher than that of the traditional process. Precipitation strengthening and dislocation strengthening were improved when the samples were formed at 200 °C. This forging process shows the advantages of short time consumption and low energy consumption, which can effectively improve the production efficiency while ensuring the strength after forming.
Key words: 6082 aluminum alloy; forging; preaging; compression behavior; hardness; precipitates
