A experimental study of grain refinement by ultrasonic treatment during continuous casting

作者：Li Xintao^*; Gao Xuepeng; Li Tingju; Li Ximeng; Jin Junze; Yin Guomao

来源：Rare Metal Materials and Engineering, 2007, 36(3): 377-380.

• continuous casting
• high-intensity ultrasonic
• Al-1%Si alloy
• grain refinement

The effect of high-intensity ultrasonic treatment on the solidified microstructure of horizontal continuously cast Al-1%Si alloy was investigated, and the mechanism of the treatment was studied. Experiment results showed that the solidification structure was refined with the increase of ultrasonic power, and the boundary segregation of Si element was suppressed. Theoretical calculation indicates, when ultrasonic frequency is 22.3 kHz, the maximum radius of cavities is 1.02 x 10(-4) in, and the number of cavities increases with the increase of ultrasonic power. The collapsing cavities will result in instantaneous high temperature and high pressure in the local zone of the melt, resulting in refining grains and improving the distribution of Si element.

• 出版日期2007-3
• 单位大连理工大学