Influence of longitudinal control magnetic field on efficiency of the arc process

Authors

DOI:

https://doi.org/10.20535/2521-1943.2021.5.2.245068

Keywords:

arc surfacing, longitudinal magnetic field, induction, penetration depth, bead width, structure refinement

Abstract

Problematic. When surfacing and welding with the action of a longitudinal magnetic field (LMF), the productivity of melting of the electrode metal increases, it is possible to control the geometric dimensions of the cross-section of the surfaced beads and welds, the structure of the surfaced metal and welds is refined, the hardness increases, the strength and ductility of the weld metal increases, and the resistance of the welds hot cracking.

Research objective. Analyze the literature data on the effect of LMF on the efficiency of the arc surfacing process of worn-out surfaces of parts and structures, taking into account the magnetic properties of electrode wires and base metal to increase the efficiency of this process.

Realization technique. Experiments were performed on submerged-arc surfacing with Sv-08A wire with a diameter of 5 mm with the action of an alternating LMF. Investigated the effect of the LMF frequency on the depth of penetration of the base metal and the width of the surfaced beads.

The results of research. It has been established that at frequencies of the LMF within the range f = 5...50 Hz, the penetration depth is less, and the width of the bead is greater than in surfacing without the action of the LMF. In the future, it is necessary to carry out studies on the effect of LMF during surfacing with flux-cored wires and strips on the metal structure of the surfaced beads and their service characteristics.

Conclusions. It has been established that for grinding the structural components of the metal surfaced with the action of LMF, it is necessary to ensure effective mixing of the liquid metal in the weld pool, that is, along its entire length. In this case, it is necessary to ensure the optimal parameters of the control magnetic fields. There is no theory that would explain the mechanism of refinement of the weld structure during arc surfacing with the action of LMF, and the existing views on this mechanism are contradictory. The data presented in the literature refer to the process of arc surfacing and welding with solid wire, there are no data on surfacing using flux-cored wires and strip electrodes.

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Published

2021-11-09

How to Cite

[1]
K. Elsayed, Razmyshlyaev О., M. Ahieieva, and O. Bilyk, “Influence of longitudinal control magnetic field on efficiency of the arc process”, Mech. Adv. Technol., vol. 5, no. 2, pp. 236–241, Nov. 2021.

Issue

Vol. 5 No. 2 (2021)

Section

Up-to-date machines and the technologies of mechanical engineering

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Copyright (c) 2021 Халед Елсаєд, Олександр Размишляєв , Марина Агєєва, Олександр Білик

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