超声场作用下镁合金熔体净化工艺  

Purification Process of Magnesium Alloy Melt under Ultrasonic Field

作　　者：张志强[1] 乐启炽[1] 崔建忠[1] 王雪[1] 张海锋[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室

出　　处：《特种铸造及有色合金》2010年第11期988-991,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB613701;2007CB613702);国家自然科学基金资助项目(50904018;51004032;50974037);新世纪人才资助项目(NCET-08-0098);中央高校基本科研业务费专项资金资助项目(90409002;90209002);中国博士后科学基金资助项目(20100471468)

摘　　要：采用XRD、SEM和图像分析软件对AZ80镁合金中夹杂的种类和形态进行了研究,并采用施加超声场来实现AZ80镁合金熔体的净化,以达到提高镁合金熔体质量的目的。研究表明,AZ80合金中夹杂主要为MgO,夹杂主要以颗粒状、团絮状、长条带状和块状形式存在。含有夹杂的AZ80合金熔体经超声处理可实现良好的净化效果,净化程度与超声功率和熔体温度有关。AZ80合金熔体在650℃经80W超声功率处理60s可以获得理想的净化效果。超声功率过大或超声处理时间过长均不利于合金熔体净化。The varieties and shape of impurities in AZ80 magnesium alloy were investigated by XRD,SEM and image analysis.Furthermore,in order to improve the quality,AZ80 magnesium alloy melt was purified by ultrasonic field.The results show that impurities in AZ80 magnesium alloy consist of mainly MgO which exists mainly in form of particle,block-like and long strip structure.It is also found that acceptable purification effects on AZ80 magnesium alloy with impurities can be obtained by ultrasonic treatment,which is related to ultrasonic power,treatment time and melt temperature.The desirable purification effects of the AZ80 magnesium alloy can be observed with ultrasonic treatment of 80W at 650℃ for 60s.It is deteriorated to purify AZ80 magnesium alloy with excessively high ultrasonic power or time.

关 键 词：镁合金 熔体净化 超声场 AZ80 

分 类 号：TG292[金属学及工艺—铸造]