Eddy current array testing of superconducting cable stainless steel sheath weld
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摘要: 针对常规无损检测方法无法满足超导电缆不锈钢护套焊缝检测要求以及较高检测效率要求的问题，采用涡流阵列检测技术对电缆不锈钢护套焊缝进行检测，通过研究检测频率、提离效应等对检测信号的影响，确定适用于薄壁不锈钢护套焊缝检测的涡流阵列检测工艺，分别在带有人工缺陷和自然缺陷的试样上进行工艺验证，同时采用X射线和工业计算机层析成像等检测方法验证涡流阵列检测工艺的有效性，为后续实现超导电缆不锈钢护套焊缝的在线实时检测提供依据。Abstract: Aiming at the problem that conventional nondestructive testing methods cannot meet the inspection requirements of superconducting cable stainless steel weld and the higher inspection efficiency requirements, the eddy current array testing is used to detect the weld of the cable stainless steel pipe. By studying the testing frequency and lift-off effect on the detection signal, it was determined that the eddy current array detection process was suitable for thin-walled stainless steel sheath weld detection. Process verification on the specimens with artificial and natural defects was performed, and the X-ray and industrial computed tomography methods were adopted to verify the validity of the eddy current array testing results. Present work can provide a basis for the subsequent realization of online real-time testing of superconducting cable stainless steel sheath weld.
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Keywords:
- superconducting cable /
- stainless steel /
- weld /
- eddy current array testing
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