人工槽模拟GH4169涡轮盘表面裂纹缺陷的微磁检测

doi:10.7527/S1000-6893.2015.0173

材料工程与机械制造

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人工槽模拟GH4169涡轮盘表面裂纹缺陷的微磁检测

胡博¹, 于润桥¹, 徐伟津²

1. 南昌航空大学无损检测技术教育部重点实验室, 南昌 330063;
2. 中国石油川庆钻探公司安全环保质量监督检测研究院, 广汉 618300

收稿日期:2015-04-09 修回日期:2015-06-06 出版日期:2015-10-15 发布日期:2015-06-09
通讯作者: 胡博, Tel.: 0791-83863759 E-mail: cumthubo@163.com E-mail:cumthubo@163.com
作者简介:胡博女, 博士, 讲师。主要研究方向: 电磁无损检测, 电磁场数值计算。 Tel: 0791-83863759 E-mail: cumthubo@163.com;于润桥男, 硕士, 教授。主要研究方向: 电磁无损检测, 无损检测仪器开发。 Tel: 0791-83863759 E-mail: yurunqiao@163.com;徐伟津男, 硕士, 工程师。主要研究方向: 无损检测。 Tel: 0838-5152134 E-mail: 630051822@qq.com
基金资助:
国家自然科学基金 (51265041, 51565043); 江西省青年科学基金 (20151BAB216016); 江西省教育厅青年科学基金 (GJJ13488)

Micro-magnetic NDT for surface crack defect in a GH4169 turbine disc simulated by artificial groove

HU Bo¹, YU Runqiao¹, XU Weijin²

1. Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang 330063, China;
2. Safety Environment Quality Surveillance and Inspection Research Institute, CNPC Chuanqing Drilling Engineering Co., Ltd., Guanghan 618300, China

Received:2015-04-09 Revised:2015-06-06 Online:2015-10-15 Published:2015-06-09
Supported by:
National Natural Science Foundation of China (51265041, 51565043), Youth Science Foundation of Jiangxi Province (20151BAB216016), Youth Science Foundation of Education Department of Jiangxi Province (GJJ13488).

摘要/Abstract

摘要：

针对航空发动机涡轮盘表面裂纹缺陷,提出一种地磁场环境下的微磁无损检测(NDT)方法。磁化试验测得了广泛使用的镍基高温合金GH4169材料的磁化特性曲线,通过磁性分析,证明该材料的相对磁导率略大于空气的相对磁导率,为弱顺磁性物质。理论分析了微磁检测适用于涡轮盘试件的检测原理和缺陷处的磁异常特征,通过对预置人工槽缺陷的涡轮盘试块进行检测,验证了理论分析的正确性。检测结果表明,随着涡轮盘表面裂纹宽度和深度的增加,磁异常的宽度和峰值也相应增加,裂纹宽度相同时,深度越深,或者说深宽比越大,磁异常越明显,且裂纹产生的位置对定位精度存在一定的影响。该微磁检测方法为涡轮盘表面裂纹缺陷的有效检测提供了新的思路,能进一步推广应用于飞机发动机的其他部件,如转子叶片、涡轮轴等,以及飞机机身上具有相似磁学特性的材料的无损检测。

关键词: 涡轮盘, 裂纹, 微磁, 无损检测, 地磁场

Abstract:

This study proposes a micro-magnetic nondestructive testing (NDT) method in the geomagnetic field to detect the surface crack defect in a turbine disc. The magnetization characteristic curve of extensively used nickel base superalloy GH4169 is obtained by magnetized test. It is proved that the relative permeability of the material is slightly greater than the relative magnetic permeability of the air through the magnetic analysis. Thus, GH4169 is a weak paramagnetic substance. The mechanism of the micro-magnetic NDT method suitable for turbine disk specimen and magnetic anomaly characteristics of the defect are analyzed. The correctness of the theoretical analysis is verified through the testing of a turbine disk contained artificial crack defects. Test results show that the width and peak of the magnetic anomalies increase along with the increase of width and depth of surface crack. When the widths of cracks are the same, the deeper the depth, or the larger the deep width ratio, the greater the magnetic anomaly, and the position of crack has a certain influence on the positioning accuracy. The micro-magnetic NDT method provides new thoughts for the detection of surface crack defects of a turbine disc. The method can be further popularized and applied to other parts of the aeroengines, such as rotor blades, turbine shaft and the aircraft fuselage with similar magnetism features.

Key words: turbine disc, crack, micro-magnetic, nondestructive testing, geomagnetic field

中图分类号:

V219

胡博, 于润桥, 徐伟津. 人工槽模拟GH4169涡轮盘表面裂纹缺陷的微磁检测[J]. 航空学报, 2015, 36(10): 3450-3456.

HU Bo, YU Runqiao, XU Weijin. Micro-magnetic NDT for surface crack defect in a GH4169 turbine disc simulated by artificial groove[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(10): 3450-3456.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

人工槽模拟GH4169涡轮盘表面裂纹缺陷的微磁检测

Micro-magnetic NDT for surface crack defect in a GH4169 turbine disc simulated by artificial groove

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