| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detecting method and an ultrasonic flaw detector which can precisely detect inclusions. Ž<P>SOLUTION: The ultrasonic flaw detecting method includes conveying a thin metal plate 1, with crystal particles 11 extending to a rolling direction, along the rolling direction and detecting inclusions 12 existing in the thin metal plate 1 by propagating an ultrasonic wave oscillating from a probe 3 through the thin metal plate 1 and receiving a reflected echo from the thin metal plate 1 by the probe 3, in which the probe 3 is disposed so that the ultrasonic wave oscillating from the probe 3 propagates through the thin metal plate 1 in a direction different from the direction perpendicular to the rolling direction viewed from the normal direction of the thin metal plate 1 in resting state of the thin metal plate 1. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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