Automatic Welding, 2024, №02



2024 №02 (04)

DOI of Article 10.37434/as2024.02.05

2024 №02 (06)

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Avtomaticheskaya Svarka (Automatic Welding), #2, 2024, pp. 26-30

Detonation coatings produced by spraying of alloyed powders based on Fe–Al intermetallics

N.V. Vigilianska, T.V. Tsymbalista, A.I. Kildii, C.V. Iantsevitch, Z.G. Ipatova, M.A. Vasylkivska

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The research results on the structure, phase composition, and properties of detonation coatings produced by spraying a mechanical mixture of Fe powders and AlMg and TiAl alloys, as well as composite powders of the same composition synthesized by the mechanochemical method, are presented. It was found that in the coatings produced with the use of mechanical mixtures of powders, the synthesis of intermetallic compounds does not occur and the coatings consist of initial components and their oxides. Therefore, it is advisable to use powders produced by the method of mechanochemical synthesis as spray materials. This results in the formation of coatings, in which the main phase is the Fe-Al intermetallic compound. Coatings of the Fe-AlMg and Fe-TiAl systems, produced by spraying of composite powders, are characterized by a dense lamellar structure consisting of alternating layers of metal and oxide components. The coatings exhibit high oxidation resistance in the temperature range of 700-800 °C, comparable to the oxidation resistance of cast iron-aluminium alloys, and allow increasing the oxidation resistance of carbon steels by 6–20 times. The corrosion resistance of Fe-AlMg and Fe-TiAl detonation coatings in a 3% NaCl solution exceeds the corrosion resistance of uncoated carbon steel by 13.3 and 28.0 times, respectively. The obtained results allow recommending to use the developed coatings for protection of parts operating in aggressive environments at temperatures of up to 800 °C. 19 Ref., 2 Tabl., 3 Fig.
Keywords: intermetallic compounds of the Fe-Al system, mechanochemical synthesis, composite powders, detonation spraying, coating, oxidation resistance, corrosion resistance


Received: 30.11.2023
Received in revised form: 07.12.2023
Accepted: 12.03.2024

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