| 2025 №05 (05) |
DOI of Article 10.37434/tpwj2025.05.06 |
2025 №05 (01) |
The Paton Welding Journal, 2025, #5, 51-54 pages
Electromagnetic-acoustic transducer with a combined magnetization
H.M. Suchkov, S.Yu. Pliesnetsov, M.Ye. Kalnitskyi, Yu.Yu. Koshkarov, I.M. Oleksenko
National Technical University “Kharkiv Polytechnic Institute” 2 Kyrpichova Str., 61002, Kharkiv, Ukrain. E-mail: hpi.suchkov@gmail.comAbstract
The use of methods and means for excitation ultrasonic pulses of transverse waves using electromagnetic-acoustic transducers is becoming increasingly widespread in industry. However, transducers based on permanent powerful magnets have disadvantages, which consist in their strong attraction to ferromagnetic products and in the adhesion of ferromagnetic particles, which leads to distortion of the results of non-destructive testing and a decrease in sensitivity. Over time, such magnets gradually lose their magnetic properties. The known transducers with a pulsed magnetization can only operate with low probing frequencies due to heating. It is proposed to use permanent magnets with a relatively low magnetic field induction and additional pulsed magnetization simultaneously. Such a technical solution increases the sensitivity of the inspection and significantly reduces the attraction of the transducer to a ferromagnetic product, and also makes it possible to significantly increase the frequency of probing the test object.
Keywords: ferromagnetic product, non-destructive testing, ultrasonic pulses, electromagnetic-acoustic transducer, magnetic field, pulsed magnetization
Received: 29.01.2025
Received in revised form: 20.03.2025
Accepted: 11.06.2025
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