Inspection device and inspection method of square billet, and method of manufacturing steel from square billet

摘要

Test one corner of a rectangular billet from a single side.The inspection apparatus comprises an array type ultrasonic probe 1a and a control device.The ultrasonic probe 1A includes a plurality of vibrators 11 for transmitting and receiving ultrasonic waves, and is arranged so that a plurality of vibrators 11 are parallel to the cross-section of the first side S1 of the billet 50 extending along the longitudinal axis X.Control deviceTowards the corner R1 connecting the second side S2 and the third sideThe ultrasonic wave is transmitted only from part or all of the vibrator 11 which is within the range of N from the vibrator 11 disposed in the nearest position to the third sideTo receive reflected ultrasonic waves by part or all of a plurality of vibratorsControl the ultrasonic probeAndBased on received reflected ultrasoundTo create an aperture synthesis image.[Orig] Figure 4A