摘要
通过对预制典型焊接缺陷的试板和在役压力管道进行磁记忆检测,并将磁记忆检测和其他无损检测方法的检测结果进行对比,表明焊接接头中的缺陷引起的应力集中会产生异常漏磁信号,可以通过磁记忆技术检测出来。利用磁记忆技术不需要打磨,检测快速、方便的特点,先对焊接接头进行磁记忆检测,再对存在异常信号的焊接接头进行常规无损检测,该方法可以提高检测的针对性,提高缺陷的检出率,获得更好的检测效果。
The magnetic memory test of the prefabricated typical welding defects and the pressure pipes in use is carried out,and the results of the magnetic memory and other nondestructive testing methods are compared.It shows that the defects in the welding will cause stress concentration and produce abnormal magnetic flux leakage signals,which can be detected by magnetic memory technology.Magnetic memory testing is carried out on welding first,and then conventional non-destructive testing was carried out on welding with abnormal signals.It is expected to improve the"hit rate"of defect detection,and achieve a better detection effect by using the magnetic memory testing characterized by its fast and convenient operation and needing no grinding.
作者
戈浩
GE Hao(Zhejiang Academy of Special Equipment Science,Hangzhou 310000,China;Key Laboratory of Special Equipment Safety Testing Technology of Zhejiang Province,Hangzhou 310000,China)
出处
《无损检测》
2020年第9期6-11,54,共7页
Nondestructive Testing
关键词
磁记忆
焊接缺陷
无损检测
metal magnetic memory testing
welding defect
nondestructive testing
