| 电磁超声检测中高温对横波声速的影响 |
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| 引用本文： | 虞雪芬,叶凌伟,夏立. 电磁超声检测中高温对横波声速的影响[J]. 华南农业大学学报(社会科学版), 2015, 33(4) |
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| 作者姓名： | 虞雪芬 叶凌伟 夏立 |
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| 作者单位： | 浙江省特种设备检验研究院，浙江杭州310020 |
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| 摘 要： | 针对高温蒸气管线常规方法无法在线检测的问题，采用电磁超声( Electromagnetic Acoustic Transducer，EMAT)技术高温测厚。讨论在25 -400℃温度下，通过EMAT测厚仪测定不同温度及厚度下试板的壁厚，计算各温度下的横渡声速，得到Q345R材料的横波声速随温度的变化规律，用以修正不同温度下EMAT实际测厚值。结果表明EMAT技术能够满足高温主蒸气管网的在线检测。
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| 关 键 词： | 在线检测；高温测厚；横波声速；蒸气管线；电磁超声( EMAT) |
Influence of High Temperature on Shear Wave Velocity of EMAT Testing |
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| YU Xuefen,YE Lingwei,XIA Li. Influence of High Temperature on Shear Wave Velocity of EMAT Testing[J]. Journal of South China Agricultural University:Social Science Edition, 2015, 33(4) |
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| Authors: | YU Xuefen YE Lingwei XIA Li |
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| Affiliation: | Zhejiang Provincial Special Equipment Inspection and Research Institute, Hangzhou 310020 , China |
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| Abstract: | In order to solve the problem that steam pipe line can't be measured on line with conventional method. theElectromagnetic Acoustic Transducer ( EMAT) technology was adopted to measure the thickness under high temperature.Under 25 -400 0C . the thickness of sample plate was measured under different temperature and thickness by EMATthickness gauge, shear wave velocity was calculated. and the change rule of shear wave velocity of Q345R material withtemperature was obtained . which is used to correct the actual thickness value of EMAT at different temperature. Theresult shows EMAT can satisfy online detection of steam piping at high temperature. |
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| Keywords: | on line inspection high temperature thickness measurement shear wave velocity steam pipe line Electromagnetic Acoustic Transducer ( EMAT) |
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