超声波导入时初始温度对铝-硅合金组织的影响  

Influence of Starting Temperature of Ultrasonic Treatment on the Structure of Al-Si Alloy

作　　者：于浩[1] 程兆虎[1] 钱怡君[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《精密成形工程》2011年第5期47-49,共3页Journal of Netshape Forming Engineering

摘　　要：采用高能超声波对Al-20％Si合金进行处理，控制Al-20％Si合金熔体温度在620～680℃，研究合金组织随超声波导入时熔体初始温度的变化规律。实验表明，随着导入超声波时熔体温度的升高，初晶硅形貌由粗大的板片状逐渐变成细小的颗粒状，超声波处理熔体的温度控制在660℃左右时，初晶硅的组织细小、圆整度高、分布均匀。Influence rules of the mierostructures of Al-20%Si alloy treated by high-intensity ultrasonic in the starting tern perature ranges between 620 ℃ and 680 ℃ were studied. The mechanism of microstructural refinement for the ultrasonic treated alloy was also discussed. With the rise of starting temperature the morphology of primary crystal silicon changed by a thick sheet into small particles gradually. The results indicated that finer primary phase could be obtained when the starting tempera ture was at about 660℃.

关 键 词：超声波处理 AL-20%SI合金 微观组织 

分 类 号：TG292[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]