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2021 №08 (01) DOI of Article
10.37434/as2021.08.02
2021 №08 (03)

Automatic Welding 2021 #08
Avtomaticheskaya Svarka (Automatic Welding), #8, 2021, pp. 9-13

Influence of longitudinal controlling magnetic field on the effectiveness of arc surfacing process

O.D. Razmyshlyaev1, M.V. Ageeva2, O.G. Bilyk1, E. Khaled1
1SHEI «Priazovskyi State Technical University». 7 Universitetskaya str., Mariupol, 87500. E-mail: office@pstu.edu
2Donbas State Mechanical Engineering Academy. 72 Akademichna Str., Kramatorsk, 84300

Literature data review showed that the longitudinal magnetic field (LMF) is used to increase the process effectiveness at arc surfacing and welding. At surfacing and welding with LMF impact, the electrode metal melting rate increases, control of the cross-sectional geometrical dimensions of the deposited bead and weld becomes possible, the structure of the deposited metal and welds is refined, and hardness, strength and ductility of weld metal, as well as hot cracking resistance of the welds become higher. It was established that effective stirring of liquid metal in the weld pool, i.e. along its entire length, should be ensured for refinement of structural components of the metal deposited under LMF impact. Here, optimum parameters of the controlling magnetic fields should be provided. In this work, experiments were performed on submerged-arc surfacing of plates from 20 mm thick low-carbon steel with 5 mm Sv-08A wire under the impact of LMF at the following frequencies: 5, 10, 20, 33 and 50 Hz. The magnitude of the longitudinal component of magnetic field induction Вz was 30...40 mT, when measured under the electrode at the surface of the plate product. The influence of LMF frequency on base metal penetration depth and deposited bead width was studied. It is found that at LMF frequencies in the range of f = 5…50 Hz, the penetration depth is smaller, while the bead width is greater than at surfacing without LMF application. 25 Ref., 4 Fig.
Keywords: submerged-arc surfacing, welding wire, controlling magnetic field, optimum modes, welded joint quality


Received: 08.06.2021

References

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