| 引用本文: | 张皓琦,沈正祥,张月莹,王杜,俞鑫,徐佳敏,余志远,孔凡玉.基于磁特性的12Cr1MoVG钢早期蠕变损伤诊断[J].材料科学与工艺,2025,33(3):78-87.DOI:10.11951/j.issn.1005-0299.20230319. |
| ZHANG Haoqi,SHEN Zhengxiang,ZHANG Yueying,WANG Du,YU Xin,XU Jiamin,YU Zhiyuan,KONG Fanyu.Diagnosis of early creep damage of 12Cr1MoVG steel based on magnetic properties[J].Materials Science and Technology,2025,33(3):78-87.DOI:10.11951/j.issn.1005-0299.20230319. |
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| 基于磁特性的12Cr1MoVG钢早期蠕变损伤诊断 |
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张皓琦1,沈正祥2,张月莹1,王杜2,俞鑫1,徐佳敏2,3,余志远2,孔凡玉3
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(1.浙江省机电产品质量检测所有限公司,杭州 310051; 2.宁波市特种设备检验研究院,浙江 宁波 315048; 3.中国计量大学 质量与安全工程学院,杭州 310018)
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| 摘要: |
| 材质劣化是锅炉主蒸汽管道失效的重要原因之一,如何快速定量化表征以蠕变损伤为主的性能劣化问题,明确性能退化遵循的规律,是主蒸汽管道高温蠕变损伤检测中亟待解决的问题。针对主蒸汽管道12Cr1MoVG钢在580 ℃、110 MPa条件下出现的高温蠕变损伤问题,采用磁矫顽力测定法和磁巴克豪森噪音法对不同损伤程度的蠕变试样进行检测,获取不同蠕变状态下相对应的磁参量特征值,并结合扫描电镜(SEM)和电子背散射衍射分析(EBSD)技术分析了不同蠕变状态下12Cr1MoVG钢的微观组织演化过程,结果表明,磁参量特征值对12Cr1MoVG钢组织微尺度损伤变化非常灵敏,可作为预测材料早期蠕变损伤的判断指标,将磁信号突变位置视作可能率先发生蠕变断裂的位置,并以此对后期出现的蠕变裂纹提前预警,为主蒸汽管道高温损伤检测提供参考。 |
| 关键词: 高温蠕变损伤 主蒸汽管道 磁矫顽力测定法 磁巴克豪森噪音法 微观组织演化 损伤状态评估 |
| DOI：10.11951/j.issn.1005-0299.20230319 |
| 分类号:TG115 |
| 文献标识码:A |
| 基金项目:中国计量大学质量与安全工程学院横向课题(H223316). |
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| Diagnosis of early creep damage of 12Cr1MoVG steel based on magnetic properties |
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ZHANG Haoqi1,SHEN Zhengxiang2,ZHANG Yueying1,WANG Du2,YU Xin1,XU Jiamin2,3,YU Zhiyuan2,KONG Fanyu3
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(1. Zhejiang Testing & Inspection Institute for Mechanical and Electrical Products Quality Co., Ltd., Hangzhou 310051, China; 2.Ningbo Special Equipment Inspection and Research Institute,Ningbo 315048,China; 3.College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,China)
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| Abstract: |
| Material deterioration is one of the major causes of failure in steam boiler piping system.It is crucial to rapidly and quantitatively characterize performance deterioration, primarily attributed to creep damage, and understand the underlying patterns of performance degradation. This remains a pressing issue in the detection of high-temperature creep damage in main steam pipelines. The high temperature creep damage behaviors in the 12Cr1MoVG specimens tested at 580 ℃ and 110 MPa were evaluated by the magnetic coercive force and the Barkhausen noise methods,obtaining the corresponding magnetic parameter eigenvalues under different creep states. The microstructure evolution of 12Cr1MoVG steel under different creep conditions were observed by means of scanning electron microscopy(SEM) combined with Electron Backscattered Diffraction (EBSD)method. The results show that the magnetic parameter eigenvalues are very sensitive to the micro-scale damage changes, and can be used as an indicator to predict the early creep damage of 12Cr1MoVG steel. By considering the location of magnetic signal mutation as the potential position where creep fracture may occur first, early warning can be provided for later occurring creep cracks. This provides a potential method for high temperature damage detection in the steam pipelines. |
| Key words: high-temperature creep damage main steam pipeline coercive force measurement method magnetic barkhausen noise method microstructure evolution damage assessment |
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