To substantiate the expansion of the area of application of plasma technology in the restoration of parts of ship equipment, the suitability of wear-resistant coatings applied by powder alloys in a plasma stream, under different conditions of external exposure: under conditions of cyclic contact pulse loading, cavitation wear and in conditions of liquid sliding friction were investigated. Wear-resistant coatings were obtained by plasma flow sputtering with intermetallic Ni-Al and Ni-Ti powder alloys, as well as with powder Ni-Cr-B-Si-C alloy, hardened with carboride phases. Bench and operational tests showed the expediency of using the coatings obtained with the use of modern plasma technologies for restoration and hardening of parts working in difficult conditions of cavitation and hydroabrasion wear, as well as in mating sliding friction pairs. The coating sprayed with a powder of intermetallic Ni-Al alloy showed a higher resistance under shock cyclic action and abrasion under liquid friction than other studied materials. Coating with a self-fluxing Ni-Cr-B-Si-C powder alloy hardened with carbon-boride solid phases loses individual particles during sliding friction. These solid fragments play the role of abrasive in the friction zone, leading to rapid wear of the mating pairs. Such coating without its additional heat treatment is not recommended for the restoration of surfaces operating in sliding friction pairs.
Structure and Protective Properties of Plasma-Sprayed Coatings
Lect. Notes in Networks, Syst.
International Scientific Siberian Transport Forum ; 2021 May 11, 2021 - May 14, 2021
International Scientific Siberian Transport Forum TransSiberia - 2021 ; Kapitel : 96 ; 870-878
18.03.2022
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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