Effect of High Intensive Ultrasonic and Forced Cooling Treatment on Microstructure Refinement and Degassing of Al-5Cu Alloy

Author of the article:YU Bing, JIA Zheng, HAN Xu, SONG Jingyi, LIU Yupeng, CHEN Xiaodong

Author's Workplace：College of Mechanical Engineering, Shenyang University, Shenyang 110044, China

Key Words：high-intensity ultrasonic; Al-5Cu alloy; density; degassing efficiency; cavitation effect

Abstract：The effect of strong cooling treatment at the bottom of ingot and high intensity ultrasonic on the solidification microstructure of Al-5Cu alloy was studied, and the degassing effect was studied by density method. The results show that ultrasonic and forced cooling treatment at the bottom of ingot has good refining and degassing effect, and the refining effect is the best at 2 000 W×120 s. The cross section of the ingot is almost 100% equiaxed grains and the internal structure is dense without pores. At this time, the ingot density is 2.791 1×103 kg·m-3 and the degassing rate is 95.1%. At last, the mechanism of refinement and degassing were analyzed.