Study on Electromagnetic Ultrasonic Testing Method for Determining Solidified Shell Thickness during Continuous Casting
作者单位：College of AutomationChongqing University Chongqing University of Technology
会议名称：《第30届中国控制与决策会议》
会议日期：2018年
学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by the National Natural Science Foundation of China(No.51374264) the basic and frontier research project of Chongqing City(No.CSTC2014jcjA50003)
关 键 词：EMA Non-destructive detection Solidified shell thickness Continuous casting
摘 要：One of the areas in the high-temperature continuous casting process that has not been definitively addressed is a method for accurately determining of solidified shell ***,this paper investigates a novel method for non-destructive detection of the solidified shell thickness based on the electromagnetic ultrasonic（EMA） *** this method,an electromagnetic ultrasonic transducer（EMAT） was utilized for exciting ultrasonic waves in the continuous casting *** to the fact that the propagation velocity of ultrasonic waves is a considerable difference in the solid and liquid metal,the TOF delay caused by the reflection and refraction at a solid-liquid interface of ultrasonic waves has been ***,studies on the effect of solidification shell thickness on ultrasonic echoes have been carried out by finite element *** the construction of the experimental platform,the measured data show close agreement with the simulation results and thus verify the reasonable and feasible of the proposed method which can provide reference for on-line detection of solidified shell thickness during continuous casting.