COMBINED METHOD FOR ULTRASONIC INSPECTION OF QUALITY OF WELD JOINTS Russian patent published in 2013 - IPC G01N29/04 

FIELD: physics.

SUBSTANCE: ultrasonic vibrations are input and received; combined source and receiver are synchronously moved along and across the weld joint and an additional receiver of said vibrations, which is placed at a certain distance opposite the main receiver, is also moved likewise; the combined source and receiver detect volume defects of the type of pores and nonmetallic inclusions; values thereof are determined; distance to the detected defects from the source and the main receiver combined with it is measured; the depth of the volume defects and distance between them on the depth are determined; the source and the additional receiver detect flat defects of the type of cracks, poor fusion and oxide films; coordinates of the transverse and longitudinal displacement of the source of ultrasonic vibrations are determined; the depth inside the weld joint of the beginning and the end of the flat defect relative the surface of entry and reception of ultrasonic vibrations is determined and the extent of the flat defects inside the weld joint is determined.

EFFECT: simple method for ultrasonic inspection of quality of butt welded joints made by electron-beam welding on the entire thickness thereof, enabling more objective inspection of the quality of weld joints.

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