Wear-Resistant Alloy for Protection of Contact Surfaces of Aircraft Engine Rotor Blades from Oxidation at High Temperatures

1Cherepova, TS
1Dmitrieva, GP
1Nosenko, AV
1Semirga, AM
1Kurdiumov Institute of Metal Physics of NASU, Kyiv
Sci. innov. 2014, 10(4):20-28
Section: Research and Technical Innovative Projects of the National Academy of Sciences of Ukraine
Language: English

Wear- and heat-resistant casting cobalt-based alloy for hardening the contact surfaces of rotor blades of aircraft gas turbine engines has been developed to replace commercial alloys HТN-61 and VZhL-2. High heat resistance was achieved by combined doping (modification) of the alloy. The optimum chemical and phase composition of alloy has been found based on the study of alloy heat resistance, wear resistance, structure, and melting point.

Keywords: alloying, cobalt alloys, heat resistance, melting point, niobium carbide, wear resistance

1. OST 1-90126-85. Casting Vacuum-Melted Heat-Resistant Alloys (in Russian).
2. Shurin, A.K., Dmytrieva, G.P., Cherepova, T.S., Andriichenko, N.V., Ivshenko, L.Y.: Patent of Ukraine on Invention no. 8240A. Cobalt-Based Alloy. Bulletin, 1 (1996) (in Ukrainian).
3. Super-Alloys II. Heat-Resistant Metals for Aerospace and Industrial Machining. (1995). In Sims, C.T. (ed.). Moscow: Metallurgy (in Russian).
4. Heat-Resistant Cobalt-Based Alloys for Application to Gas Turbines. Mater. Sci. and Eng., 88, 11—19 (1987) (in Russian).
5. Reznik, I.D., Sobol, S.N., and Khudiakov, V.M.(1995, 1996). Cobalt. Moscow: Machine-Building (in Russian).
6. Physical Properties of Materials, Materials Engineering. Materials Selector, 103, 12, 81—83 (1986).
7. Shurin, A.K., Cherepova, T.S., Andriichenko, N.V., and Zamkovyi, V.Ye.: Cobalt-Based Alloy. Patent of Ukraine on Useful Model no.39450. Bulletin, 4, (2009) (in Ukrainian).
8. Heat-Resistant Materials. In: Sobolev, A.S and Novik, V.S. (Trans.) Moscow: Metallurgy (1969) (in Russian).
9. Perelman, F.M. and Zvorykin, A.Ya. (1975). Cobalt and Nickel. Moscow: Nauka (in Russian).
10. Dmyrrieva, G.P., Cherepova, T.S., and Shurin, A.K.: Phase Equilibria in Co-CoAl-W Alloys. Metal Science and Metal Treatment, 4, 3—6 (2005) (in Ukrainian).
11. Dmyrrieva, G.P., Cherepova, T.S., and Shurin, A.K.: Phase Equilibrium in Co-CoAl-W Alloys. Metal Science and Metal Treatment, 2, 22—25 (2006) (in Ukrainian).