【摘要】 研究了高强超声处理对Al-2Mg凝固组织及除气的影响。结果表明,应用超声处理可达到很好的细化和除气效果,2 000 W超声处理30 s的细化效果最好,铸锭断面等轴晶最多;处理90 s的除气效果最好,铸锭密度和除气率分别为2.624 4 g·cm^-3和51.9%。超声的高频振动产生空化效应持续时间越久,除气效果越明显。更多还原

【Abstract】 The effect of high-intensity ultrasonic treatment on solidification structure and degassing of Al-2 Mg alloy was investigated. The results show that ultrasonic treatment could achieve good refining and degassing effect, the best refining effect is achieved at 30 s with ultrasonic treatment at 2 000 W, and the most isometric crystals are found in the ingot section. The best degassing effect is obtained when treated with 90 s, the ingot density and degassing rate are 2.624 4 g·cm^-3 and51.9%, respectively. Ultrasonic cavitation effect created by the high frequency vibration of the longer duration, degassing effect is more apparent.更多还原