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Some aspects of improving the quality of GTE cast turbine blades of nickel superalloys
https://doi.org/10.22349/1994-6716-2021-108-4-82-98
Abstract
The results of the development of casting technology for single-crystal high-pressure turbine blades from nickel superalloys with a crystallographic orientation (CGO) [001] were obtained on an automated casting unit for directional crystallization UVNK-9A, at machine-building enterprise. The construction of the casting blades blocks, technologies for the manufacture of molds, rods and casting of GTE working blades of heatresistant nickel alloys with a single-crystal structure and set-up CGO have been developed under real production conditions on UVNK-9A units substituting through-type furnaces. It is shown that preproduction series of single-crystal castings of working blades with shroud shelf were obtained, with a yield of suitable structure ≥ 75%. The structural-phase characteristics of the alloy of single-crystal blades castings were investigated by scanning electron microscopy in as cast state and after subsequent heat treatment. A comparative quantitative analysis of the microstructure and strength characteristics of supernickel alloy castings with CGO [001], obtained on a high-gradient directional crystallization unit and in a through-type furnace.
About the Authors
E. M. Visik
National Research Center “Kurchatov Institute” – VIAM»
Russian Federation
Russian Federation
Cand Sc. (Eng)
17 Radio St, 105005 Moscow
L. I. Rassokhina
National Research Center “Kurchatov Institute” – VIAM»
Russian Federation
Russian Federation
17 Radio St, 105005 Moscow
A. B. Echin
National Research Center “Kurchatov Institute” – VIAM»
Russian Federation
Russian Federation
Cand Sc. (Eng)
17 Radio St, 105005 Moscow
M. V. Gamazina
National Research Center “Kurchatov Institute” – VIAM»
Russian Federation
Russian Federation
17 Radio St, 105005 Moscow
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Review
For citations:
Visik E.M., Rassokhina L.I., Echin A.B., Gamazina M.V. Some aspects of improving the quality of GTE cast turbine blades of nickel superalloys. Voprosy Materialovedeniya. 2021;(4(108)):82-98. (In Russ.) https://doi.org/10.22349/1994-6716-2021-108-4-82-98
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