Structure and Properties of a Wear-Resistant Alloy Based on a Cobalt with Niobium Carbide
G. P. Dmitrieva, T. S. Cherepova, Т. O. Kosorukova, V. I. Nichiporenko
G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
Received: 04.03.2015; final version - 23.06.2015. Download: PDF
Structure, phase composition, and properties of the off-the-shelf wear resistant industrial alloy KhTN-61 designed at the IMPh, N.A.S. of Ukraine for the protection of the blades’ contact surfaces in gas turbine engines at high temperatures are investigated. The optimal range of niobium/carbon ratio providing melting temperature above 1300°C is determined. As a result, appropriate changes of the industrial technology of the alloy fabrication are studied. As shown, the wear resistance and the heat resistance of the industrial alloy with optimal composition at temperatures up to 1100°C are caused by structure formed upon crystallization of cobalt—niobium carbide eutectic.
Key words: cobalt, niobium carbide, industrial alloy, phase composition, eutectic, structure, wear resistance.
PACS: 62.20.Qp, 68.60.-p, 81.05.Bx, 81.05.Je, 81.05.Ni, 81.40.Cd, 81.40.Pq
Citation: G. P. Dmitrieva, T. S. Cherepova, Т. O. Kosorukova, and V. I. Nichiporenko, Structure and Properties of a Wear-Resistant Alloy Based on a Cobalt with Niobium Carbide, Metallofiz. Noveishie Tekhnol., 37, No. 7: 973—986 (2015) (in Russian)