ULTRASONIC FLAW INSPECTION DEVICE FOR ROUND BAR MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an ultrasonic flaw inspection method and ultrasonic flaw inspection device, capable of effectively reducing a surface echo width, securing sensitivity necessary for detecting an internal defect with a transverse surface length of 100 μm or less, and further preventing malfunction due to air bubbles, in an ultrasonic flaw inspection test of a round rod material with a diameter of 8 mmφ.SOLUTION: This invention employs an ultrasonic flaw inspection device including a mechanism configured to relatively move a position of a round bar material and positions of a transmission probe and reception probe. The transmission probe and the reception probe are oppositely arranged, and a center point of the transmission probe and the reception probe, a center point that is an incident point of beam on the surface of the round bar material when beam is transmitted from the transmission probe, and a center axis of the round bar material are arranged on the same plane. Further, the transmission probe and the reception probe have an angle adjustment function and a position adjustment function.SELECTED DRAWING: Figure 3