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采用高能超声波对Al-20%Si合金进行熔体处理,研究超声波处理对Al-20%Si合金微观组织形貌的影响。控制Al-20%Si合金熔体温度在620～680℃之间时,研究合金凝固组织随熔体温度和超声波处理参数的变化规律。结果表明,随着导入超声波输出功率的增大和处理时间的延长,Al-20%Si合金的初晶硅形貌由粗大的板片状逐渐变成细小的球状颗粒;超声波处理熔体的温度控制在660℃左右时,可以获得最佳的效果,初晶硅的尺寸细小、圆整度高、分布均匀。
The effects of ultrasonic treatment on the microstructure of Al-20% Si alloy were studied by using high-energy ultrasonic wave to melt Al-20% Si alloy. When the melt temperature of Al-20% Si alloy was controlled between 620 ~ 680 ℃, the variation of solidification microstructure of the alloy with melt temperature and ultrasonic treatment parameters was studied. The results show that the primary silicon morphology of Al-20% Si alloy gradually changes from coarse plate-like to fine spherical particles with the increase of the input ultrasonic power and the processing time. The temperature of the ultrasonic-treated melt At about 660 ℃, the best results can be obtained, the size of primary silicon small, high roundness, uniform distribution.