传感技术学报2025，Vol.38Issue(10)：1741-1750,10.DOI:10.3969/j.issn.1004-1699.2025.10.003
高温碳钢锻件电磁超声检测回波影响规律分析
Analysis of the Influence Law of Electromagnetic Ultrasonic Testing Echo of High-Temperature Carbon Steel Forgings
吴剑剑 1廖开星 1孔祥龙 1关雅静 1仇云林 1王红珂1
作者信息
- 1. 苏州热工研究院有限公司,江苏 苏州 215004
- 折叠
摘要
Abstract
Implementing online defect detection and local dimension measurement during the high-temperature forging process improves the forging quality,economic level,and yield of forgings.Taking high-temperature carbon steel forgings as the testing object,the numeri-cal modeling method and experimental research on the influence law of electromagnetic ultrasonic testing echo of high-temperature car-bon steel forgings are carried out.According to the functional relationship between material parameters such as conductivity,permeabili-ty,and magnetostrictive piezomagnetic coefficient of carbon steel magnetic materials and temperature,a finite element model of electro-magnetic ultrasonic testing process of medium carbon steel is established considering two energy transfer mechanisms of Lorentz force and magnetostrictive effect.The contribution proportion of temperature to Lorentz force and magnetostrictive effect to ultrasonic waves excitation and reception is analyzed.A high-temperature shear wave electromagnetic acoustic transducer(EMAT)is developed.Testing experiments of carbon steel forgings with a thickness of 100 mm at 50℃-750℃are carried out,which verify the influence of tempera-ture on electromagnetic ultrasonic testing echo.The results show that when the temperature range of carbon steel forgings is 50℃-500℃,500℃-627℃,627℃-750℃respectively,the electromagnetic ultrasonic testing echo decreases slowly,increases rapidly,and decreases sharply with the increase of temperature.The high-temperature shear wave EMAT developed can achieve a signal-to-noise ratio of 33.9 dB at a high temperature of 750℃and a duration of 10 minutes.关键词
电磁超声换能器/高温碳钢锻件/温度/磁致伸缩效应Key words
electromagnetic acoustic transducer/high-temperature carbon steel forgings/temperature/magnetostrictive effect分类
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吴剑剑,廖开星,孔祥龙,关雅静,仇云林,王红珂..高温碳钢锻件电磁超声检测回波影响规律分析[J].传感技术学报,2025,38(10):1741-1750,10.
