Automatic Welding, 2022, №01



2022 №01 (05)

DOI of Article 10.37434/as2022.01.06

2022 №01 (07)

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Avtomaticheskaya Svarka (Automatic Welding), #1, 2022, pp. 41-45

Formation of the penetration zone of the base metal in arc surfacing with the action of a longitudinal magnetic field

O.D. Razmyshlyaev¹, M.V. Ahieieva²

¹State Higher Educational Establishment «Pre-Azov State Technical University» (PSTU). 7, Universitetskaya Str., 87500, Mariupol, Ukraine. Е-mail: razmyshljaev@gmail.com
²Donbass State Machine Building Academy, 72, Akademicheskaya Str., 84313, Kramatorsk, Ukraine. Е-mail: maryna_ah@ukr.net

In the work, the assumption was experimentally confirmed that the longitudinal magnetic field (LMP) in submerged arc surfacing can have a braking effect on the speed of movement of liquid metal in the welding pool. Using the calculation method and physical modelling, the values of the braking force depending on the speed of movement of electric conductive bodies under the action of LMP were established. The performed experiments in arc surfacing using the submerged wire showed that at the action of both constant as well as alternating LMP of 50 Hz frequency, the thickness of the interlayer of liquid metal in the pool under the arc increases by approximately 1.5...2.0 times. This allows concluding that the fact of decrease in the penetration depth of the base metal during surfacing with the action of LMP is predetermined by the braking effect of the magnetic field on the speed of liquid metal flows in the pool, followed by increase in the thickness of the interlayer of liquid metal under the arc and deterioration of the efficiency of the arc heat transfer to the base metal. 10 Ref., 1 Tabl., 4 Fig.
Keywords: arc surfacing, longitudinal magnetic field, induction, flow braking, penetration depth


Received: 08.11.2021

References

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10. Boldyrev, A.M., Birzhev, V.A., Chernykh, A.V. (1993) Calculation of hydrodynamic parameters of liquid metal at the bottom of the molten pool in arc welding. Ibid, 7(6), 481-483. https://doi.org/10.1080/09507119309548431

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