P91钢蠕变损伤的非线性超声检测方法研究

doi:10.3901/JME.2018.24.034

机械工程学报 ›› 2018, Vol. 54 ›› Issue (24): 34-41.doi: 10.3901/JME.2018.24.034

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P91钢蠕变损伤的非线性超声检测方法研究

谷涛^1,2, 王强¹, 胡斌², 孙亮², 赵潇男², 梁晓瑜³

1. 中国计量大学质量与安全工程学院杭州 310018;
2. 中国特种设备检测研究院北京 100029;
3. 中国计量大学计量测试工程学院杭州 310018

收稿日期:2018-01-30 修回日期:2018-07-27 出版日期:2018-12-20 发布日期:2018-12-20
通讯作者: 胡斌(通信作者),男,1977年出生,博士,研究员。主要研究方向为无损检测技术。E-mail:hubin@csei.org.cn
作者简介:谷涛,男,1991年出生。主要研究方向无损检测技术。E-mail:1098825569@qq.com;王强,男,1976年出生,博士,教授。主要研究方向为无损检测技术。E-mail:qiangwang@cjlu.edu.cn
基金资助:
国家重点研发计划课题（2016YFC0801903）和质检公益性行业科研专项（201410027）资助项目。

Study on the Method of Nonlinear Ultrasonic Testing for Creep Damage of P91 Steel

GU Tao^1,2, WANG Qiang¹, HU Bin², SUN Liang², ZHAO Xiaonan², LIANG Xiaoyu³

1. College of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018;
2. China Special Equipment Inspection and Research Institute, Beijing 100029;
3. Nondestructive Testing Center, China Jiliang University, Hangzhou 310018

Received:2018-01-30 Revised:2018-07-27 Online:2018-12-20 Published:2018-12-20

摘要/Abstract

摘要： 针对现有的非线性超声评价金属高温蠕变状态的方法中存在的问题，借鉴了高频段能量与低频段能量之比作为非线性参数的定义方式及兰姆波应力波损伤因子表达式，提出利用一定频带范围内非线性参数的累积效应表征金属蠕变损伤程度的新方法。根据非线性能量从低频向高频转移的特性，得到某一激发频率下的高频段能量与低频段能量之比的非线性参量，其次，在考虑基波能量与高次谐波能量随频率变化的基础上，对一定频率范围内得到的非线性参量进行积分，得到累积非线性响应总和。应用该方法对实际现场截取的P91钢主蒸汽管道蠕变程度进行检测（该管道运行温度为550℃，运行压力为3 MPa，运行时间约3万小时）。检测结果与较精确的X射线衍射法测得的残余应力及传统的非线性系数方法作对比，结果表明，累积的非线性参数方法灵敏度较高，稳定性较好，与应力的测量结果符合性较好，能够跟随试样所受应力的改变评价管道的蠕变程度。

关键词: P91主蒸汽管道, X射线衍射法, 非线性超声, 累积的非线性参数

Abstract: In view of the existing problems in evaluating the high temperature creep of metal by the nonlinear ultrasonic method and with referring to the use of the ratio of high frequency to low frequency energy as the definition of nonlinear parameters and to the expression of the stress wave factor, a new method of using the cumulative effect of nonlinear parameters in a certain frequency band to characterize the damage degree of the metal creep is proposed. According to the characteristics of the nonlinear energy transfer from low frequency to high frequency, the nonlinear parameters of the ratio of the high frequency energy to the low frequency band at a certain excitation frequency are obtained. On the basis of the change of the fundamental wave energy and the high harmonic energy with the frequency, the integral of the nonlinear parameters obtained in a certain frequency range is then integrated. The summation of cumulative nonlinear responses is obtained. This method is used to detect the creep degree of the P91 steel main steam pipe intercepted by the actual field. The pipe was operated at temperature of 550℃ with operating pressure of 3 MPa, and it had run for about 30 thousand hours. The results are compared with the residual stress measured by the more accurate X ray diffraction method and the traditional nonlinear coefficient method. The results show that the cumulative nonlinear parameter method has high sensitivity and good stability, and it is consistent with the stress measurement results. It can follow the stress change to evaluate the creep degree of the pipeline.

Key words: cumulative nonlinear parameters, nonlinear ultrasound, P91 main steam pipe, X ray diffraction method

中图分类号:

TG115

谷涛, 王强, 胡斌, 孙亮, 赵潇男, 梁晓瑜. P91钢蠕变损伤的非线性超声检测方法研究[J]. 机械工程学报, 2018, 54(24): 34-41.

GU Tao, WANG Qiang, HU Bin, SUN Liang, ZHAO Xiaonan, LIANG Xiaoyu. Study on the Method of Nonlinear Ultrasonic Testing for Creep Damage of P91 Steel[J]. Journal of Mechanical Engineering, 2018, 54(24): 34-41.

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P91钢蠕变损伤的非线性超声检测方法研究

Study on the Method of Nonlinear Ultrasonic Testing for Creep Damage of P91 Steel

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