讨论了一种检测铁磁材料内部应力的无损检测新技术。利用该技术，以近饱和磁化产生的巴克豪森效应与应力的关系，测量了铁磁构件的二轴应力和焊接构件的残余应力。检测结果与传统的Ｘ射线检测法的结果相一致。该检测技术在工程检测中有广泛的适用性。 A new nondestructive testing technique for detecting the internal stress of ferromagnetic materials is discussed. Using this technique, the biaxial stress of ferromagnetic components and the residual stress of welded components were measured by the relationship between Barkhausen effect and stress caused by near-saturation magnetization. The test results are consistent with the results of conventional X-ray detection. The detection technology in engineering testing has a wide range of applicability.