Method and apparatus for ultrasonic flaw detection of T-welded portion of steel product
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United States of America Patent
Stats
-
Nov 6, 1984
Grant Date -
N/A
app pub date -
Dec 10, 1982
filing date -
Dec 10, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Herein disclosed is a method for ultrasonic flaw detection of T-welded portion of steel product. The method comprises: maintaining the flange portion horizontally, making convergent ultrasonic beams incident on the flange portion vertically to the top face of the flange portion through a medium, scanning the incident beams transversely of the welded portion, detecting ultrasonic echo from a depth corresponding to the bottom face thickness of the flange portion, and comparing the level of said ultrasonic echo with a predetermined threshold value. Disclosed also is an apparatus for carry out the above method. These method and apparatus are suited particularly to the on-line flaw detection of the welded shape steel.
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