Al-5％Pb合金的超声波分散效果  

Dispersion Effect of Al-5%Pb Alloy by Ultrasonic Stirring

作　　者：李军文[1,2,3] 宋生海[2] 桃野正[3] 

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]辽宁工业大学材料科学与工程学院,辽宁锦州121001 [3]国立室兰工业大学材料物性工学科,日本北海道室兰050-8585

出　　处：《铸造工程》2011年第6期17-20,共4页Foundry Engineering

基　　金：教育部留学回国人员科研启动基金资助项目;江南大学科研启动基金（20100385）

摘　　要：以A1-5％Pb合金为对象，研究了超声波工艺参数对Pb溶质分布的影响。利用背散射电子成像（BSE）扫描对试样进行了检测，测试了试样的硬度及磨损性能。实验结果表明：在铸造条件下，采用超声波处理能够有效抑制Al-Pb合金的溶质偏析。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；过短的处理时间达不到Pb溶质分散的目的，而过长的处理时间会使Pb粒子发生聚集，只有采用合适的处理时间才能达到理想的分散效果。Pb溶质分散得细小均匀可以有效地提高硬度及耐磨性。The effects of ultrasonic vibration parameters on lead solute distribution were studied by using the Al-5%Pb alloys. The samples were measured by BSE, and the hardness and wearing property of samples were tested. The results indicate that ultrasonic treatment can effectively prevent solute segregation in the condition of foundry, and ultrasonic power has a direct effect on lead solute dispersibility. Oversize power and undersize power can not have the optimum effect, and the short treating time can not disperse solute. However, the long treating time can concentrate lead particles, so the proper treating time only can reach optimum dispersed effect.

关 键 词：超声波 功率 处理时间 A1-5%Pb合金 分散 BSE 

分 类 号：TG146.21[一般工业技术—材料科学与工程]