摘要
为研究连铸二次冷却区凝固坯壳厚度电磁超声无损检测机理,分析了连铸坯表面振痕对超声波信号的影响。利用有限元分析方法,建立螺旋线圈电磁超声换能器在连铸坯表面的电场、磁场、力场和声场的耦合模型。并以贝塞尔曲线方程模拟表面振痕,分析了表面振痕对连铸坯集肤表层的涡流、磁场、力场等分布规律的影响。实验结果验证了仿真分析中模型和仿真结果的正确性,为设计连铸过程凝固坯壳厚度电磁超声无损检测装置提供了理论参考依据。
In order to study the non-destructive testing（NDT）mechanism of solidification shell thickness measurement in secondary cooling zone of continuous casting,the influence of vibration ripples on casting billet was analyzed.The coupling model of electric field,magnetic field and force field with spiral coils was established by finite element analysis method.To analyze the influence of vibration marks on the distribution of eddy current field,magnetic flux field and Lorentz force field,Bessel curve was used to simulate the surface vibration mark.Experiment results verify the correctness of electromagnetic ultrasonic model and the simulation analysis,which can provides a theoretical reference for the design of electromagnetic acoustic transducer applied to continuous casting solidification shell thickness detection.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2016年第6期78-82,共5页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(51374264)
重庆市基础与前沿研究资助项目(CTSC2014jcja50003)
关键词
连铸
无损检测
凝固坯壳
电磁超声
continuous casting
non-destructive testing
solidification shell
electromagnetic acoustic transducer
作者简介
欧阳奇（1971-），男，博士，教授；E-mail：yangqi@cqu．edu．cn
