基于磁性方法的集成无损检测装置研究

摘要

为了对铁磁性材料的残余应力、微裂纹等缺陷进行快速检测,设计了基于AMR传感器的集成无损检测装置.该装置集成了磁记忆检测技术、漏磁检测技术和磁巴克豪森噪声检测技术,并对含残余应力带与不同方向预制裂纹的45#钢试件进行检测实验.结果表明:该集成装置既可以检测试件中的残余应力,又可以识别不同角度的微裂纹缺陷,并且可以对残余应力进行定量化评价,实现了铁磁材料残余应力、微裂纹等损伤状态的综合评估.%In order to detect residual stress of ferromagnetic materials,micro cracks and other defects,an integrated non de?structive testing device using AMR magnetic sensor was manufactured which contains detection technology of magnetic memory, magnetic flux leakage and Barkhausen.The test of 45 steel specimens with prefabricated cracks in different directions and stress concentration zone was carried out.The results show that the device can not only detect the residual stress but also can evaluate micro crack defects,implementing comprehensive evaluation of the residual stress,micro crack damage status and so on.