Technical Diagnostics and Non-Destructive Testing, 2024, №01



2024 №01 (06)

DOI of Article 10.37434/tdnk2024.01.01

2024 №01 (02)

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Technical Diagnostics and Non-Destructive Testing #1, 2024, pp. 3-7

Research of the residual magnetization of steel structures after local magnetization with an attachable magnetic transducer

V.M. Uchanin¹, S.M. Minakov², R.M. Solomakha³

¹G.V. Karpenko Physico-Mechanical Institute of NASU. 5 Naukova str., 79060, Lviv, Ukraine. E-mail: vuchanin@gmail.com
²NTUU «Igor Sikorsky Kyiv Polytechnic Institute». 37 Beresteysky Ave., 03056, Kyiv, Ukraine. E-mail: minakovsergey61@gmail.com
³CM DIAGNOSTICS sp. z o.o., ul. Przemiarki 23, lokal 8, Krakow, Poland. E-mail: rsolomak@gmail.com

The general problem of residual magnetization of steel products and a typical case of its formation after cyclic magnetization by an attachable type magnetic transducer in the process of magnetic structural analysis by hysteresis loop parameters determination is highlighted. The importance of reliable assessment of residual magnetization, including for quality control of demagnetization of steel products, is emphasized. The method of determining the residual magnetization and evaluating the quality of the demagnetization procedures of steel products by measuring the residual magnetic field is presented. Residual magnetization of 09G2C type steel specimen after hysteresis loop parameters measuring using a magnetic analyzer of the KRM-Ts-MA type depending on the number of magnetization cycles and its distribution in the area of application of the attachable type magnetic transducer was investigated. It is shown that after multiple magnetization, the level of residual induction in 09G2C type steel products does not exceed 0,75 mT, which allows welding without additional demagnetization operations. The tasks of further research on the influence of residual magnetization of steel products made of different steels on their further use and the formation of additional noise during eddy current testing are formulated. It was shown that the presence of residual magnetization after multiple measurements of hysteresis loop parameters does not affect the accuracy of their repeated measurement, which confirmed the stability of the measurement procedure with a KRM-Ts-MA type magnetic analyzer with respect to the residual magnetization created by it. 16 Ref., 3 Fig.
Keywords: residual magnetization, magnetic structural analysis, attachable magnetic transducer, parameters of the magnetic hysteresis loop, demagnetization

Received: 03.01.2024
Received in revised form: 14.01.2024
Accepted: 12.03.2024

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