| 电站铁磁构件的磁记忆检测 |
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| 引用本文： | 任吉林,高春法,宋凯,邬冠华,唐继红.电站铁磁构件的磁记忆检测[J].仪器仪表学报,2003,24(5):470-472,476. |
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| 作者姓名： | 任吉林 高春法 宋凯 邬冠华 唐继红 |
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| 作者单位： | 南昌航空工业学院,南昌,330034 |
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| 基金项目： | 教育部重点研究项目资助课题 (地方 0 10 6 3)，江西省测控工程研究中心基金资助课题 (0 10 0 6 ) |
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| 摘 要： | 介绍了一种对铁磁构件进行早期诊断的无损检测新技术，分析了铁磁构件在有、无外应力情况下的能量变化，应用带磁偶极子模型等效受力构件的磁畴定向排列，计算得出了构件应力集中区的漏磁场分布。并以电站锅炉管座角焊缝为例，在对其残余应力进行了有限元分析的基础上，作了磁记忆检测。理论分析与试验结果表明，磁记忆检测技术适用于电站锅炉及压力容器管道的检测，可望在实际工程中得到推广应用。
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| 关 键 词： | 电站 铁磁构件 磁记忆检测 无损检测 磁记忆 残余应力 角焊缝 |
Application of Magnetic Memory Testing on Ferromagnetic Items in Power Station |
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| Ren Jilin Gao Chunfa Song Kai Wu Guanhua Tang Jihong.Application of Magnetic Memory Testing on Ferromagnetic Items in Power Station[J].Chinese Journal of Scientific Instrument,2003,24(5):470-472,476. |
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| Authors: | Ren Jilin Gao Chunfa Song Kai Wu Guanhua Tang Jihong |
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| Abstract: | A new non-destructive testing technology which can diagnose ferromagnetic items in early stage is introduced, energy change is analyzed in different stress conditions, leak magnetic field distributing of component stress concentrate zone is calculated in terms of magnetic dipole model. FEM model is obtained about residual stress of angle weld of power station boiler. Experimental results of magnetic memory testing show this method is useful to boiler and pressure vessel in power station, it has wide application prospects in the practical engineering. |
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| Keywords: | Magnetic memory testing Residual stress Angle weld NDT |
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