超声波处理对Al-Pb合金铸锭偏析及性能的影响  

Effect of Ultrasonic Treatment on Segregation and Property of Al-Pb Alloy Ingots

作　　者：贾征[1] 李军文[1] 宋生海[1] 周岐[1] 

机构地区：[1]辽宁工业大学材料与化学工程学院金属超声凝固研究室,辽宁锦州121001

出　　处：《铸造工程》2010年第3期22-25,共4页Foundry Engineering

基　　金：辽宁省自然科学基金资助项目（20082177）.

摘　　要：以Al-Pb合金为研究对象，研究了超声波处理对合金铸锭溶质分布的影响。利用BSE对试样进行了检测，且测试了试样的硬度以及磨损性能。结果表明：在铸造条件下，采用合适的超声波处理时间能够有效抑制Al-Pb合金的溶质偏析；溶质含量过高时，超声波处理熔体分散溶质效果不好，当处理时间为180s时，A1-1％Pb的分散效果最好；超声波功率对Pb溶质分散性有直接的影响，功率过大或功率过小都达不到令人满意的分散效果。最后，利用超声波的空化效应以及声流效应说明了产生上述现象的原因。The effect of solute distribution causing by ultrasonic treating using the Al-Pb alloy was studied. The samples were measured by BSE, and the hardness and wearing property of samples was tested. The results indicate that ultrasonic treatment can effectively prevent solute segregation of Al-Pb on the condition of foundry, and the dispersed effect of ultrasonic treatment is not optimum when the contents of solute is excess. It has an optimum dispersed effect for Al-1%Pb when the duration is 180 s. Ultrasonic power has a direct effect on lead solute dispersibility. Oversize power and undersize power can not reach the optimum effect. Finally, the reasons of phenomena above are explained by ultrasonic cavitation and acoustic streaming.

关 键 词：AL-PB合金 溶质分布 BSE 超声波 偏析 空化 声流 

分 类 号：TG146.21[一般工业技术—材料科学与工程]