摘要
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 ℃. 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 ℃ for 4 h and holding at 200 ℃ 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 ℃. 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.
提出一种新的6082铝合金锻造工艺,该工艺在保证力学性能的同时可节约时间、降低能耗。该工艺将坯料在固溶温度进行预锻,然后进行预时效,最终在200℃进行终锻。通过热压缩实验研究预时效后的压缩行为和力学性能,通过SEM、TEM和DSC研究不同工艺参数下试样的析出相差异。研究发现在120℃预时效4h,并在200℃保温10 min的材料具有最佳综合性能,锻件维氏硬度为HV 128,比传统工艺锻件的高。在200℃下终锻时,材料在析出强化和位错强化提升较大。该锻造工艺具有耗时短、能耗低的优势,能在保证强度达标的前提下有效提高生产效率。
基金
financially supported by the National Natural Science Foundation of China (Nos. 51775397, 52075400)
“111” Project of China (No. B17034)
the Major Program of Science and Technology Program of Hubei Province, China (Nos. 2019AAA007, 2020BAB140)
the Innovative Research Team Development Program of Ministry of Education of China (No. IRT17R83)。
