钢板近表面缺陷的交流电磁场检测  

Alternating Current Field Measurement of the Near-Surface Cracks in Steel Plate

作　　者：胡江 任尚坤[1] 祖瑞丽 HU Jiang REN Shangkun ZU Ruili(Key Laboratory of Nondestructive Testing of Ministry of Education, Nanchang Hangkong University, Nanchang 330063, Chin)

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063

出　　处：《无损检测》2017年第9期11-14,共4页Nondestructive Testing

基　　金：国家自然科学基金资助项目(51065024)

摘　　要：将金属薄片覆盖在含有人工裂纹的钢板上来模拟近表面缺陷,通过搭建交流电磁场检测的试验平台来提取近表面缺陷的磁场信号。试验得出了近表面裂纹交流电磁场检测的最佳激励频率、最大埋深厚度及影响近表面裂纹检测的因素,以为近表面裂纹的实际检测提供参考。In view of the near surface defects detection,steel plates containing artificial cracks were covered with the sheet metal to simulate the near-surface defects,and the experiment platform of ACFM was built to extract magnetic field signal of the near-surface defects.Experimental data were analyzed,and the optimal excitation frequency,the maximum burial depth and related influencing factors of ACFM on near-surface cracks were obtained,which could provide a reference for the practical detection on the near-surface cracks.

关 键 词：交流电磁场检测 近表面裂纹 激励频率 

分 类 号：TG806[金属学及工艺—公差测量技术] TG115.28