【摘要】 飞机发动机叶片基体出现裂纹时表面反映不明显,孔探仪检查表面裂纹实际判别的难度较大,因此用交变磁场非接触式探测法探测。介绍探伤原理、特点以及与其它无损检测方法的比较,最后给出了发动机叶片的检测实例。检测结果表明,该方法检出的大小裂纹的波形与实际裂纹相符甚好,因此较传统涡流法和孔探仪法更具优越性,具有实际应用价值。更多还原

【Abstract】 Alternating current field measurement(ACFM) technique was applied for non-contact detection of the cracks in aeroengine blades due to the fact that it was difficult to judge surface cracks with hole testing equipment when the cracks were not obvious on blade surface.The principles and characteristics of ACFM and its comparison with other nondestructive testing methods were described.At last,a testing example of engine blade by ACFM was given,showing the good compatibility of the waves obtained with practical cracks.It was concluded that ACFM was superior to traditional eddy current testing method and hole testing equipment in on-site detection of engine blade cracks,and it would be valuable for practical application.更多还原