Modification performance on 4032 Al alloy by using Al-10Sr master alloys manufactured from different processes

作者：Liao Chengwei; Chen Jianchun; Li Yunlong; Chen Huan; Pan Chunxu^*

来源：Progress in Natural Science, 2014, 24(2): 87-96.

DOI：10.1016/j.pnsc.2014.03.002

• Al-10Sr master alloy
• 4032 Al alloy
• Sr
• Modification
• Addition amount
• Holding time

The microstructures and modification performance on 4032 aluminum alloy of the Al-10Sr master alloy wire prepared from "direct reaction-hot extrusion" and the trapezoidal block from "direct reaction" were systemically studied by using optical metallurgical microscope, XRD and SEM. It was found that the preparation processes exhibited a significant effect on the microstructures of the Al-10Sr, which thereby influenced its modification performance. It has been found that when the Al-10Sr alloy wire was used, a desirable modification was obtained after 2 min and reached to the best performance at 60 min, and the optimum Sr addition amount was 0.04-0.06 wt%, and the good modification performance was kept even after 300 min. However, when the Al-10Sr alloy trapezoidal block was used, a desirable modification was started after 30 min and reached to the best performance as long as 120 min, and the optimum Sr addition amount was 0.06-0.08 wt%, and the effective modification period was only 180 min. Therefore, comparing with the Al-10Sr alloy trapezoidal block, the Al-10Sr alloy wire had better modification efficiency, which not only reduced the Sr addition amount of about 30%, but also greatly decreased the incubation time and improved the ability of anti-fading.

• 出版日期2014-4
• 单位武汉大学