Research on Simulation Verification of Alternating Current Field Measurement Testing of Thin-walled Austenitic Stainless Steel Welds in Nuclear Power Plant

WANG Yuxin; GAO Yu; MA Yingbing; YANG Huimin; YUAN Xinan; GUO Lifeng

doi:10.7512/j.issn.1001-2303.2023.12.05

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Research on Simulation Verification of Alternating Current Field Measurement Testing of Thin-walled Austenitic Stainless Steel Welds in Nuclear Power Plant
Vol. 53, Issue 12, Pages: 33-39(2023)
DOI： 10.7512/j.issn.1001-2303.2023.12.05

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王宇欣，高宇，马迎兵，等.核工程薄壁不锈钢焊缝交流电磁场检测模拟验证［J］.电焊机，2023，53（12）：33-39.

WANG Yuxin, GAO Yu, MA Yingbing, et al.Research on Simulation Verification of Alternating Current Field Measurement Testing of Thin-walled Austenitic Stainless Steel Welds in Nuclear Power Plant[J].Electric Welding Machine, 2023, 53(12): 33-39.
王宇欣，高宇，马迎兵，等.核工程薄壁不锈钢焊缝交流电磁场检测模拟验证［J］.电焊机，2023，53（12）：33-39. DOI： 10.7512/j.issn.1001-2303.2023.12.05.

WANG Yuxin, GAO Yu, MA Yingbing, et al.Research on Simulation Verification of Alternating Current Field Measurement Testing of Thin-walled Austenitic Stainless Steel Welds in Nuclear Power Plant[J].Electric Welding Machine, 2023, 53(12): 33-39. DOI： 10.7512/j.issn.1001-2303.2023.12.05.

摘要

针对薄壁（壁厚≤3.5 mm）奥氏体不锈钢焊缝缺陷检测需求，研发了一套包括探头和系统装备、方法、工艺的交流电磁场检测系统。设计了含不同类型、尺寸和位置缺陷的模拟试块，分别进行交流电磁场检测（ACFM）和射线检测（RT）盲测，并对比分析检测结果。验证试验结果表明：研发的ACFM检测系统和工艺稳定可靠，可实现薄壁不锈钢焊缝超标缺陷的快速有效筛查；ACFM效率是RT的3倍以上，对于预制的210处超标缺陷，RT检出169处，ACFM检出217处（含RT检出的169处），其中面积型缺陷均100%检出，误报率能满足工程需求；具有不低于RT的检出能力；ACFM技术对焊缝表面状态较敏感，适当打磨不影响缺陷检出。高灵敏度ACFM检测的研究和应用为薄壁非铁磁性材料焊缝内部缺陷检测提供了新思路。

Abstract

China Nuclear Power Engineering Co., Ltd. led the research and development of a set of ACFM technology including probe, system equipment, methods and processes for the volume detection of thin-wall(≤3.5 mm) stainless steel welds in a national key engineering project.In this paper, a simulation test with different types, sizes and positions of defects was designed. ACFM and RT blind test were carried out respectively, and the test results were compared and analyzed. The verification test results show that the developed ACFM detection system and process are stable and effective, and can realize the rapid and effective detection of excessive defects in thin-wall stainless steel welds. For the super-standard defects in simulated test blocks, ACFM technology has no lower detection capability than RT. ACFM technology is sensitive to weld surface state, proper grinding does not affect the detection of defects.The research and application of high sensitivity ACFM detection provides a new idea for the detection of internal defects in welds of thin-walled non-ferromagnetic materials.

关键词

薄壁不锈钢焊缝交流电磁场检测射线检测模拟验证缺陷检出率

Keywords

alternating current field measurementsimulation verificationthin-walled austenitic stainless steel welds

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