35CrMo钢超声波铸造的导波系统模态分析及实验研究  

Modal Analysis of Ultrasonic Waveguide for 35Cr Mo Steel Ultrasonic Casting and Experiment Research

作　　者：梁根[1,2] 石琛[1,2] 毛大恒[1,2] 肖常安 

机构地区：[1]中南大学高性能复杂制造国家重点实验室,湖南长沙410083 [2]中南大学机电工程学院,湖南长沙410083 [3]湖南长高新材料股份有限公司,湖南株洲412000

出　　处：《铸造》2016年第4期313-318,共6页Foundry

基　　金：国家重点基础研究发展计划(973)基金资助项目(2014CB046702)

摘　　要：为实现35Cr Mo钢的超声波铸造,研究了超声波在钢熔体中的导入方式,并通过模态分析优化了超声波导入杆的结构和尺寸。同时通过35Cr Mo钢的超声铸造实验考察了超声波导入杆的性能及超声波对35Cr Mo钢凝固组织的作用效果。结果表明:针对高温熔体,超声波T型导入方式与L型导入方式相比,T型导入方式与振动系统匹配更好,且当工具头尺寸为135 mm时,匹配性能达到最佳;氮化硅陶瓷工具头在35Cr Mo钢中能较长时间工作而不出现腐蚀,并且能改善35Cr Mo钢的凝固组织,使其晶粒得到细化,显微疏松得到改善。To achieve ultrasonic casting of 35 Cr Mo steel, the importing ways of ultrasonic introduced into steel melt was studied, and the structure and size of ultrasonic guide rod were optimized by modal analysis. At the same time, the performance of the developed ultrasonic guide rod was investigated through the ultrasonic casting experiment of 35 Cr Mo steel, and the effects of ultrasonic on solidification microstructure of 35 Cr Mo steel was investigated too. In view of the high temperature melt, compared with L-shaped import mode,T-shaped import mode matches with vibration system better, and when the probe size is 135 mm, the matching performance achieves the best. Silicon nitride ceramic probe in 35 Cr Mo steel can work a long time without corrosion, and can improve the solidification microstructure of 35 Cr Mo steel, the grains are refined,microporosity is obviously improved.

关 键 词：35CRMO钢 超声波导入杆 超声波铸造 组织细化 显微疏松 

分 类 号：TG26[金属学及工艺—铸造] TB559[理学—物理]