

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. VisikRussian Federation
Cand Sc. (Eng)
17 Radio St, 105005 Moscow
L. I. Rassokhina
Russian Federation
17 Radio St, 105005 Moscow
A. B. Echin
Russian Federation
Cand Sc. (Eng)
17 Radio St, 105005 Moscow
M. V. Gamazina
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