超声波处理对6061铝合金晶粒大小的影响

Effect of Ultrasonic Treatment on Grain Size of 6061 Alloy

分别在745～715℃、715～685℃和685～655℃温度段,研究了超声处理对6061铝合金晶粒尺寸大小的影响。结果表明:铸态6061铝合金微观组织对超声波振动很敏感。超声处理后,随着温度降低,铸锭晶粒尺寸减小,晶粒圆整度更好,微观组织得到明显地改善。其中,在温度段685～655℃施加超声振动后,晶粒细化效果最佳,与未施加超声振动时相比,平均晶粒尺寸减小近50%。

The effect of ultrasonic treatment on the grain size of 6061 aluminum alloy was investigated at the temperature ranges of 745-715 ℃, 715-685 ℃ and 685-655 ℃, respectively. The results indicated that the microstructure of this alloy is very sensitive to the ultrasonic vibration. With the decrease of treatment, the grain size of the alloy decreases, the grain roundness is better, the microstructure of this alloy improves obviously. The 6061 aluminum alloy treated at the temperature ranges of 685,655 ℃, the grain refinement effect is the best, the average grain size reduces about 50%.