Ultrasonic flaw detection method jig flaw defect criteria and using the jig flaw detection criteria defect

摘要

PURPOSE: To simply and accurately detect the reflection echo from e reference hole of ϕ4×4 of a standard testpiece STB-A3. ;CONSTITUTION: A jig 1 has a guide 11 formed at the outer end face in the same shape ass the end face of a standard testpiece STB-A3 and extended obliquely to the longitudinal direction of the jig 1 and a scale indicating the horizontal distance from a reference defect and attached along the guide 11. The jig 1 is mounted on the upper or lower surface of the STB-A3 and so aligned that the end face of the STB-AC and the outer end face of the jig 1 become substantially in plane. The probe 2 of an ultrasonic flaw detector is brought into contact with the guide 11, moved to the scale position responsive to the refractive angle of the probe 2 with the scale as a measure, and an ultrasonic wave is transmitted. As long as the probe 2 is brought into contact with the guide 11, the wave from the probe 2 is emitted to the center of the reference defect, and hence the reflection echo from the reference defect can be effectively detected.;COPYRIGHT: (C)1996,JPO