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筒形锻件缺陷取向比较复杂,对筒形锻件进行超声检测时,一般用直探头在外圆面和端面进行扫查,同时用横波斜探头外圆面轴向和周向扫查以分别探测横向缺陷和平行于轴线的径向缺陷。然而对于内外径之比小于0.6的筒形锻件周向超声检测,由于技术难度较大,国内外缺少相应的检测标准和成熟的检测工艺,JB/T4730.3—2005((承压设备无损检测第三部分超声检测》只适用内外径之比大于等于0.8筒形锻件
Cylindrical forgings defect orientation more complex, when the cylindrical forgings for ultrasonic testing, the general use of straight probe in the outer surface and the end of the scan, while the outer surface of the shear wave axial and circumferential scanning probe to detect lateral defects And radial defects parallel to the axis. However, for circumferential ultrasonic testing of cylindrical forgings whose internal / external diameter ratio is less than 0.6, due to the technical difficulty, there is a lack of corresponding testing standards and mature testing technologies at home and abroad. JB / T4730.3-2005 ((Nondestructive Testing of Pressure Equipment The third part of the ultrasonic test "only applies to the outer diameter ratio of greater than or equal to 0.8 forgings