Ultrasonic flaw detection of welded joints
In modern construction and industry, a large number of objects with welded joints are used. To ensure their safe operation, all seams must be checked regularly.
Various methods are used for control. non-destructive testingHowever, the most effective is ultrasonic inspection. Having appeared in 1930, this method has not lost its relevance and popularity. And this is not surprising, since ultrasound diagnostics give the most accurate results.
Ultrasonic flaw detection of welds is based on the ability of high-frequency vibrations to penetrate into the metal and be reflected from cracks, voids and other defects. Radiation enters the test compound and, in the event of a defect, deviates from its normal propagation. This process is displayed. device, and the specialist in a number of ways determines the nature of the damage.
Before conducting ultrasound diagnostics, the surface of the seam is thoroughly cleaned and lubricated with a special tool. After calibrating the device, the specialist scans the weld, moving in zigzag movements along its entire length. If a defect occurs in the wave path, the signal with the largest amplitude is displayed. At the end of the study, all information is recorded in a special journal.
Ultrasonic flaw detection allows you to conduct a study without decommissioning an object, and is also characterized by mobility, speed and efficiency.