| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detection method for rapidly and surely detecting cracks developing on a cylindrical inner surface of an inspected body. SOLUTION: Ultrasonic flaw detection is performed on a cylindrical inner surface of the inspected body by using an ultrasonic flaw detector having a transmission probe for transmitting an ultrasonic and a reception probe for receiving an ultrasonic. With respect to the transmission and reception probes arranged in the central axis direction of a cylindrical shape formed by the cylindrical inner surface of the inspected body, or else, with respect to the transmission and reception probes arranged in the circumferential direction of the cylindrical shape formed by the cylindrical inner surface of the inspected body, ultrasonic flaw detection is performed by causing them to make, at least, either movement in the central axis direction of the cylindrical shape or rotation in the circumferential direction thereof. COPYRIGHT: (C)2004,JPO
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