文献类型：期刊文献

中文题名：钎焊耦合高温波导杆技术测厚可靠性研究

英文题名：Study on thickness measurement reliability of high temperature waveguide rod technology using brazing coupling

作者：贾九红[1];姚戴锋[1];田红春[1];王一宁[2];曹伟烨[2];彭善柏[3]

机构：[1]华东理工大学承压系统与安全教育部重点实验室,上海200237;[2]江苏省特种设备安全监督检验研究院,南京210036;[3]上海新阵元电子科技有限公司,上海200030

年份：2021

卷号：38

期号：2

起止页码：7

中文期刊名：压力容器

外文期刊名：Pressure Vessel Technology

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：国家重点研发计划课题(2018YFC0808806);上海市自然科学基金面上项目(18ZR1408800)。

语种：中文

中文关键词：波导杆;钎焊耦合;高温;测厚;误差分析

外文关键词：waveguide rod;brazing coupling;high temperature;thickness measurement;error analysis

摘要：高温环境下,由于腐蚀、冲刷等原因,导致典型承压设备的壁厚减薄位置具有相对固定性,减薄部位是泄漏、开裂的高风险区,波导杆在线监测技术是提高承压设备运行安全性的有力保障。为了提升壁厚监测的长期可靠性,将波导杆与被测试样采用钎焊耦合的连接方式,探索了一种超声波长期测量高温结构壁厚测量的方法;然后通过大量试验研究,证明了基于钎焊耦合的波导杆技术可以长期稳定地激发并传递纯净的非频散类SH0波,并精确地测量了0~300℃的温度范围下SH0*波在316L不锈钢中的传播速度,为高温环境中在役设备损伤的测量提供了精准的超声波速度值。然后对不同厚度的试样,在不同温度下研究了测厚的可靠性和长期稳定性,发现基于钎焊耦合的波导杆技术可以准确地测量出试样±0.1 mm的厚度变化;该测量技术绝对误差小于0.05 mm,且各个测试点的相对误差均小于0.5%。试验结果,表明基于钎焊耦合的高温波导杆技术可以长期稳定地用于高温结构的壁厚监测,并且测量精度较高。
Due to corrosion and erosion of typical pressure equipment in high temperature environments,the location of the wall thickness reduction is relatively fixed,and the thinning location is a high risk area that causes leakage and cracking.The online monitoring technology of waveguide rod is a powerful guarantee for improvement of its operation safety.In order to improve the long-term reliability of wall thickness monitoring in high temperature environments,a technique for long-term ultrasonic measurement of wall thickness of high temperature structures was explored by connecting the waveguide rod with the specimen under test by brazing coupling.Then through a large number of tests,it is proved that the waveguide rod technology based on brazing coupling could excite and deliver pure non-dispersive quasi-fundamental shear horizontal wave(shorten for SH0*)over long term and stably.And the propagation speed of SH0*wave in 316L stainless steel in the temperature range of 0~300℃was accurately measured,which provides accurate ultrasonic velocities for the damage measurement of in-service equipment in high temperature environments.Then,the reliability and long-term stability of thickness measurement were studied at different temperatures for the specimens with different thicknesses.It was found that the waveguide rod technique based on brazing coupling could accurately measure the thickness variation within±0.1 mm.The absolute error of the measurement technique was less than 0.05 mm,and the relative error of each measurement points was all less than 0.5%.The test results show that the high temperature waveguide rod technique based on the brazing coupling could be used to monitor the wall thickness of high temperature structures over long term and stably with a high measurement accuracy.