| 摘要 |
PROBLEM TO BE SOLVED: To obtain an automatic ultrasonic flaw-detecting device for simultaneously detecting the flaw of a base material welded part and a padding welded part. SOLUTION: Ultrasonic fly detection by TOFD method and that by PA method are simultaneously conducted on a welded joint part 10. In the PA method, an array probe 21 where a number of vibrators for receiving ultrasonic waves are arranged linearly in the width direction of the welded joint part 10 is used for detecting the flaw of a padding welded part 11 and a base material welded part 12. In the TOFD method, two pairs of transmission and reception probes provided adjacent to the array probe 21 and across the padding welded part are used for performing the ultrasonic flaw detection of the base material welded part. |
