TPWJ, 2021, #3, 16-21 pages
Electric arc spraying of intermetalic Fe–Al coatings using different solid and powder wires
Yu.S. Borisov, A.L. Borisova, N.V. Vihilyanska, I.A. Demyanov and O.M. Burlachenko
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
The mechanism of formation and structure of coatings based on the system iron-aluminium, sprayed by electric arc
method using wires of solid cross-section and a flux-cored wire were investigated. The grain-size composition, structure
and microhardness of particles (spraying products of electrode wires of iron and aluminium) captured from the spraying
jet, as well as structure, phase composition and microhardness of electric arc coatings of the system iron-aluminium
were studied. It was found that during spraying of Fe + Al and Fe + AlMg wires, the interaction of particles in the jet
does not occur and the products of spraying represent particles of iron and aluminium with the appropriate hardness.
In this case, the formation of intermetallics in the coatings also does not occur and they have a heterogeneous structure
consisting of the components based on iron and aluminium. It was found that intermetallic FeAl structure is formed
only after heat treatment of sprayed coatings at 650 °C. During spraying of flux-cored wire FCW(Fe–Al) in the process
of melting the sheath and the filler, the interphase interaction occurs, which results in the formation of coatings with a
microhardness of 2460 ± 290 MPa, the main phase of which is intermetallic Fe3Al. 21 Ref., 1 Table, 6 Figures.
electric arc spraying, intermetallic, iron-aluminium, coating, solid cross-section wire, flux-cored wire,
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