超声处理对Al-2Cu合金凝固组织及熔体除气效果的影响  

Influence of ultrasonic treatment on solidification structure and melt degassing effect of Al-2Cu alloy

作　　者：陈杼鑫 路林 贾征[1,2] 杜安娜 徐海鹏 王彤 Chen Zhuxin;Lu Lin;Jia Zheng;Du Anna;Xu Haipeng;Wang Tong(College of Mechanical Engineering,Shenyang University,Shenyang 110044,China;Key Laboratory of Electromagnetic Process of Materials under Ministry of Education,NortheasternUniversity,Shenyang 110819,China)

机构地区：[1]沈阳大学机械工程学院,辽宁沈阳110044 [2]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819

出　　处：《轻金属》2020年第10期54-57,共4页Light Metals

基　　金：辽宁省自然科学基金(20170520094);辽宁省自然科学基金指导计划项目(2019-ZD-0561);2019年沈阳大学大学生创新创业训练计划项目(2019110350102);国家自然科学基金,青年科学基金项目(51901037);辽宁省科学技术基金,博士启动基金(2019-BS-083)。

摘　　要：本试验研究了超声处理时间对Al-2Cu合金凝固过程中组织及熔体除气效果的影响。结果表明:采用功率为2000 W、频率为20 kHz对Al-2Cu合金熔体施加超声处理,可以获得良好的除气效果,使铸锭晶粒细化;当超声处理时间约为90 s时,晶粒细化和除气效果最佳,铸锭断面几乎100%为等轴晶,铸锭密度以及除气率分别达到了2.726 g·m^-3和67%。The influence of ultrasonic treatment time on the structure and melt degassing effect of Al-2Cu alloy during the solidification process was studied in this test.The result showed that the favorable degassing effect and grain refinement could be achieved after the ultrasonic treatment of Al-2Cu alloy melt at 2000 W and 20 kHz.When the treatment time was about 90 s,both the grain refinement and degassing effects were the best.The ingot section was almost 100%equiaxed.The ingot density and degassing rate reached 2.726 g·cm^-3 and 67%,respectively.

关 键 词：超声处理 Al-2Cu合金 密度 除气率 空化效应 

分 类 号：TG[金属学及工艺]