Avtomaticheskaya Svarka (Automatic Welding), #3, 2021, pp. 17-22
Electric arc spraying of intermetalic Fe–Al coatings using different solid and powder wires
Yu.S. Borisov, A.L. Borisova, N.V. Vihilianska, I.A. Demianov, O.M. Burlachenko
E.O. Paton Electric Welding Institute of the NAS of Ukraine.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
The mechanism of formation and structure of coatings based on the system iron-aluminum, sprayed by electric arc method using
wires of solid cross-section and flux-cored wire were investigated. The grain-size composition, structure and microhardness of
particles (spraying products of electrode wires of iron and aluminum) captured from the spraying jet, as well as the structure, phase
composition and microhardness of electric arc coatings of the system iron-aluminum 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 aluminum 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 aluminum. 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 PD(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 Tabl., 6 Fig.
electric arc spraying, intermetallic, iron-aluminum, coating, solid cross-section wire, flux-cored wire, microstructure
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11. Borisov, Yu.S., Borisova, A.L., Burlachenko A.N. et al. (2017) Structure and properties of alloyed powders based on Fe3Al intermetallic for thermal spraying produced using mechanochemical synthesis method. The Paton Welding J., 9, 33-39. https://doi.org/10.15407/tpwj2017.09.06
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