基于ACFM的奥氏体不锈钢不规则裂纹可视化重构方法研究

doi:10.3901/JME.2020.10.027

机械工程学报 ›› 2020, Vol. 56 ›› Issue (10): 27-33.doi: 10.3901/JME.2020.10.027

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基于ACFM的奥氏体不锈钢不规则裂纹可视化重构方法研究

袁新安, 李伟, 殷晓康, 陈国明, 赵建明, 蒋维宇, 张展, 薛瑞琪

中国石油大学(华东)海洋油气装备与安全技术研究中心青岛 266580

收稿日期:2019-04-20 修回日期:2019-09-13 出版日期:2020-05-20 发布日期:2020-06-11
通讯作者: 李伟(通信作者),男,1980年出生,博士,教授,博士研究生导师。主要研究方向为智能无损检测技术、电磁场仿真、信号处理及仪器开发。E-mail:ronald8044@163.com
作者简介:袁新安,男,1990年出生,博士研究生,副教授。主要研究方向为电磁无损检测、信号处理及缺陷智能识别技术。E-mail:xinancom@163.com;陈国明,男,1962年出生,教授,博士研究生导师。研究方向为海洋油气开采安全保障技术、石油装备安全可靠性工程、计算机辅助机械工程。E-mail:offshore@126.com
基金资助:
国家重点研发计划（2017YFC0804503）、博士后创新人才支持计划（BX20190386）、中国博士后科学基金（2019M662461）、国家自然科学基金（51574276）、中央高校基本业务经费（18CX05017A）和山东省重点研发计划（2018GHY115026）资助项目。

Visual Reconstruction of Irregular Crack in Austenitic Stainless Steel Based on ACFM Technique

YUAN Xinan, LI Wei, YIN Xiaokang, CHEN Guoming, ZHAO Jianming, JIANG Weiyu, ZHANG Zhan, XUE Ruiqi

Center for Offshore Engineering and Safety Technology, China University of Petroleum(East China), Qingdao 266580

Received:2019-04-20 Revised:2019-09-13 Online:2020-05-20 Published:2020-06-11

摘要/Abstract

摘要： 奥氏体不锈钢具有良好的耐腐蚀性、高韧性和塑性，在石化特种装备和海洋结构中有着广泛应用。奥氏体不锈钢通常在高温、高压、强腐蚀介质中服役，结构表面可产生各种类型不规则裂纹缺陷，威胁结构安全服役。由于不导磁、弱导电、晶粒粗大的特性，传统无损检测对奥氏体不锈钢表面不规则裂纹检测和评估存在诸多挑战。提出基于交流电磁场检测（Alternating current field measurement，ACFM）技术的奥氏体不锈钢不规则裂纹可视化重构方法，建立奥氏体不锈钢不规则裂纹ACFM有限元仿真模型，分析不规则裂纹周围电磁场畸变规律，提出垂直方向磁场（垂直于试块方向磁场，称为B_z）图像梯度场的不规则裂纹表面轮廓可视化重构方法，利用不规则裂纹检测试验验证可视化重构方法的效果。结果表明，ACFM探头感应电流可在奥氏体不锈钢不规则裂纹端点聚集，聚集电流引起垂直方向磁场B_z畸变，B_z图像梯度场可反映电流聚集位置，B_z图像梯度场可视化重构方法能够实现奥氏体不锈钢不规则裂纹表面轮廓可视化成像显示及精确评估。

关键词: 交流电磁场检测, 可视化重构, 不规则裂纹, 奥氏体不锈钢

Abstract: For the advantages of corrosion resistance, high toughness and plasticity, the austenitic stainless steel is widely used in the petrochemical special equipment and offshore structure. The austenitic stainless steel usually services in high temperature, high pressure and corrosive medium environment. Various types of irregular cracks are easily introduced in the surface of the austenitic stainless steel, which threats the safety of the structure. Due to the property of non-magnetic, weak conductivity and coarse grain, it is still a challenge to detect and evaluate irregular cracks in the austenitic stainless steel using the nondestructive testing (NDT) method. The visual reconstruction method is presented to detect and evaluate the irregular crack in the austenitic stainless steel based on the alternating current field measurement (ACFM) technique. The austenitic stainless steel irregular crack ACFM finite element simulation model is set up. The distorted electromagnetic field around the irregular crack is analyzed. The vertical direction magnetic field (magnetic field perpendicular to specimen, called B_z) image gradient field visual reconstruction method is presented to reconstruct the surface profile of the irregular crack. The irregular crack testing experiments are carried out to verify the efficiency of the visual reconstruction method. The results show that the current field induced by the ACFM probe gathers at the tips of the irregular crack in the austenitic stainless steel. The gathered current makes the vertical direction magnetic field B_z distorted. The B_z image gradient field can reflect the location of the gathered current. The surface profile of the irregular crack can be imaged visually and evaluated accurately by the B_z image gradient field visual reconstruction method.

Key words: ACFM, visual reconstruction, irregular crack, austenitic stainless steel

中图分类号:

TG156

袁新安, 李伟, 殷晓康, 陈国明, 赵建明, 蒋维宇, 张展, 薛瑞琪. 基于ACFM的奥氏体不锈钢不规则裂纹可视化重构方法研究[J]. 机械工程学报, 2020, 56(10): 27-33.

YUAN Xinan, LI Wei, YIN Xiaokang, CHEN Guoming, ZHAO Jianming, JIANG Weiyu, ZHANG Zhan, XUE Ruiqi. Visual Reconstruction of Irregular Crack in Austenitic Stainless Steel Based on ACFM Technique[J]. Journal of Mechanical Engineering, 2020, 56(10): 27-33.

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基于ACFM的奥氏体不锈钢不规则裂纹可视化重构方法研究

Visual Reconstruction of Irregular Crack in Austenitic Stainless Steel Based on ACFM Technique

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