用内插式探头磁化涡流和远场涡流检测技术对8个电厂48台加热器碳钢管进行了检测,试验结果表明,磁化涡流对碳钢管通孔和内壁缺陷检测灵敏度较高,对外壁缺陷检测灵敏度较低,容易区分内外壁缺陷;远场涡流对碳钢管通孔检测灵敏度较低,对内外壁缺陷检测灵敏度较高,但难以区分内外壁缺陷。 Magneto-eddy current detection of 48 heater carbon steel tubes in 8 power plants was carried out with magnetized eddy current and far-field eddy current detection technique of interpolated probe. The results show that magnetization eddy current has high sensitivity to detecting through-hole and inner wall defects of carbon steel tube, Low sensitivity and easy to distinguish inner and outer wall defects; far field eddy current detection sensitivity of carbon steel tube through hole is low, the detection sensitivity of the inner and outer wall defects is high, but it is difficult to distinguish between inner and outer wall defects.