| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detection method and a device therefor, capable of detecting with a high S/N ratio, micro defects at a surface layer part of a material to be inspected having a coarse surface like a slab, by using immersion testing (full immersion testing, partial immersion testing, and a water-column ultrasonic method). SOLUTION: In the ultrasonic flaw detection method for detecting flaws of the material to be inspected via water by using a piezoelectric oscillator, creeping waves are transmitted to the material to be inspected, and creeping waves reflected by a defect existing in the material to be inspected are received at a position different from the transmission position of the creeping waves. COPYRIGHT: (C)2008,JPO&INPIT
|
