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在工业纯铝的凝固过程中引入超声场,探讨了超声细化晶粒的机理,并具体研究了超声功率、导入声波的熔体温度区间对铸锭凝固组织的影响规律.实验结果表明:铝熔体经超声处理后,凝固组织均得到显著细化,这主要取决于超声的空化效应和声流效应;超声功率增大时,组织细化程度提高,功率达到170W时细化效果最好,继续增大功率则细化作用减弱;施振温度区间对凝固组织的影响也有相似的规律,在合理的温度导入声波,晶粒能细化到最佳程度.
Ultrasonic field was introduced in the solidification process of industrial pure aluminum, the mechanism of ultrasonic grain refinement was discussed, and the effect of ultrasonic power and melt temperature range of imported acoustic wave on the solidified structure of ingot was studied.The experimental results show that aluminum After the melt was sonicated, the solidified tissue was significantly refined, which mainly depends on the cavitation effect and the acoustic flow effect of ultrasound; when the ultrasonic power is increased, the degree of refinement of the tissue is increased, and the refinement effect is best when the power reaches 170W , Continue to increase the power attenuation effect is weakened; Shi Zhen temperature range on the solidification organization has a similar rule, the introduction of sound waves at a reasonable temperature, the grain can be refined to the best level.