Control of the formation of metal structure surfaced with flux-cored wires

Keywords

arc surfacing, deposited bead, fusion penetration depth, forming quality, metal struc¬ture, flux-cored wire.

Cite as

Ryabtsev І. О., Babinets А. А., and Lentyuhov І. Р. Control of the formation of metal structure surfaced with flux-cored wires. Physicochemical Mechanics of Materials. 2024. 60(3), 048-055.

https://doi.org/10.15407/pcmm2024.03.048

Abstract

Control of fusion penetration, the fraction of the base metal in the deposited material, as well as the formation and structure of the metal deposited by the arc method on cylindrical and flat parts with self-shielding powder-coated wires PD-Np-25Kh5FМС ∅ 1.8–2.8 mm were experimentally studied. It was established that the welding current has the greatest influence on the fusion penetration and the fraction of the base metal in the deposited ma­terial, and the arc voltage affects the stability of the process, the quality of the deposited metal formation and the presence of defects in it. At the same time, during arc welding of cylindrical parts, the above indicators change with the shift of the axis of the electrode wire (arc) from the zenith of the cylindrical part that is being welded, against the direction of its rotation. It is shown that by changing the deposition modes, which lead to a decrease in the linear energy, it is possible to control the structure of the deposited metal, by decrea­sing the width of the crystallites and increasing its microhard­ness. The use of the results obtained in this work made it possible to increase the productivity of the welded parts by reducing the number of welded layers.

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