功率超声在液态金属成形方面作用及应用  

Principle and application of power ultrasonic treatment in molten metal shaping

作　　者：孟秀凤[1] 孙勇[1] 赵磊[1] 彭明军[1] 李玉阁[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《南方金属》2007年第4期1-3,7,共4页Southern Metals

摘　　要：综述功率超声在液态金属成型方面的应用,现状及在熔体中的作用原理.介绍超声波对熔体结晶形核、细化晶粒的作用机制.超声波使晶粒细化、组织均匀化导致组织和力学性能有良好的改善.合理的选择超声波的频率、变幅杆在金属溶液中的位置、声强及辐射时间、优化工艺参数等是今后研究的方向.The principle and application of power ultrasonic treatment in molten metal shaping, and the current advancement status of the technique are summarized; as well as the mechanisms by which nucleation takes place and grains are refined during the crystallization of the molten metal are elucidated. The ultrasonic treatment plays an important role in refining grains and obtaining homogeneous microstructure, thus leading to a striking improvement in the microstructure and mechanical properties. The key points in further improving the technique would be focused on （ 1 ） properly selecting the frequency, intensity and radiation time of the ultrasonic wave, （2） correctly setting the position of the shift pole in the molten metal, and （3） optimizing the process variables.

关 键 词：功率超声 声空化 超声振动 超声熔体处理 

分 类 号：TN015[电子电信—物理电子学] TG115[金属学及工艺—物理冶金]