超声波处理对Al-Pb合金铸锭偏析及性能的影响.pdfVIP

学兔兔 画 铸造工程 Foundry Engineering 超声波处理对A l-Pb合金铸锭偏析及性能的影响 贾 征，李军文，宋生海，周 岐 (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) 摘要：以A1-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A1-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，当处理时问为1 80 S时，Al一1％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。 关键词：Al-Pb合金；溶质分布；BSE；超声波；偏析；空化；声流 中图分类号：TG146．2 1 文献标识码：A 文章编号：1673—3320(2010)03—0022—04 Effect of Ultrasonic Treatment on Segregation and Property of AI-Pb Alloy Ingots Jia Zheng，Li Junwen，Song Shenghai，Zhou Qi (College of Material and Chemical Engineering，Liaoning University of Technology Jinzhou 1 21 001，Liaoning，China) Abstract：The ef．fect 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一1％Pb when the duration is 1 80 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． Key words：A1一Pb alloy；solute distribution；BSE；ultrasonic；segregation；cavitation；acoustic streaming 利用高能超声场处理合金熔体是一种相对环