摘要
随着无损检测技术的不断发展 ,对金属构件进行早期的探伤诊断成为无损检测领域的一个新的研究热点。金属磁记忆检测方法是利用铁磁物质的磁机械效应 ,通过检测金属构件的漏磁场强度来确定应力集中部位 ,并根据应力集中进一步确定焊接缺陷的一种无损检测手段。与其它无损检测方法相比它最大的优点在于能够早期“预言”容易产生缺陷的位置并且直接利用地磁场进行检测而无须对构件进行另外的磁化。简要介绍了金属磁记忆检测方法的研究现状、原理。
Early NDT diagnosis for metal component has become a new study hotspot in NDT field along with the continuous development of NDT technology.Metal magnetic memory inspection method is a NDT mean that using the magnetic mechanical effect of ferromagnetic to determine stress concentrated position through inspection the leakage magnetic field strength of metal component and further determine welding defects in accordance with the stress concentration.Compared with other NDT inspection method,the most strongpoint is early NDT diagnosis method could early'forecast'the position that easily produce defects and directly use geomagnetism field to inspect and no need to carry out additional magnetization to the component.It briefly introduced that study actuality,principle,equipment as well as its developing prospect of metal magnetic memory inspection method.
出处
《焊管》
2004年第3期34-36,91,共3页
Welded Pipe and Tube
关键词
焊接缺陷
金属磁记忆检测
磁致伸缩
无损检测
welding defects inspection metal magnetic memory magnetism caused flex
