2016-11-11 Rongda test 390 times
Detection Purpose: Detect inclusions, cracks, shrink tubes, white spots, delamination and other defects in metal and we
Detection range: Detection of metal ingots, billets, plate, large forgings, pressure vessels and other metal products
Ultrasonic testing is the use of ultrasound can penetrate into the depths of the metal materials, and consists of a section into another section, on the edge of the interface reflection characteristics of flaws, a method to check the parts when the ultrasonic beam from the surface by the probe through the metal parts inside, encountered defects with parts respectively when bottom reflection wave, formation of pulse waveform on the screen, according to the pulse waveform to judge the defect position and size.
There are many wave patterns when ultrasonic wave propagates in the medium. The most commonly used wave in inspection is longitudinal wave, shear wave, surface wave and plate wave. Longitudinal wave can be used to detect inclusions, cracks, shrinkage tubes, white spots, delamination and other defects in metal ingots, billets, plates, large forgings and parts with simple shapes. Transverse wave can be used to detect circumferential and axial cracks, scratches, pores, slag inclusion, cracks, incomplete welding, etc. Surface defects on simple castings can be detected by surface waves. Defects in thin plates can be detected by plate waves.
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