The magnetic memory method, through examining the leakagemagneticfield on the surface of the parts, can effectively find out the defects in fillet joints, which can diminish the leakage.
磁记忆法通过对部件表面漏磁场的检测，可以有效检测管座角焊缝中存在的缺陷，减少泄漏现象的发生。
2
The magneticleakagefield distribution above linear defects of a tube sample under the geomagnetic field was modeled according to magnetic dipole theory.
利用磁偶极子理论，建立稳恒微弱地磁场作用下管类试件线状缺陷段产生的漏磁场模型。
3
Based on the spatial distribution of magnetic dipole, the equation of the normal component of leakagemagneticfield on the tube surface under low-intensity field was derived.