Abstract
New high efficiency land based gas turbines made by General Electric Company have a significantly higher firing temperature than previous units. These new units require alloy 718 for turbine rotor disks which are many times heavier than aircraft engine size disks. Producing large diameter ingots for such components presents unique melting challenges. This paper discusses the development of these melting processes and presents results from ingots and forgings. Production parts are being produced from ingots 685 mm in diameter. Ingots up to 915 mm diameter have been produced and are in the process of being forged into parts for evaluation.
Cite
CITATION STYLE
Thamboo, S. V., Schwant, R. C., Yang, L., Jackman, L. A., Bond, B. J., & Kennedy, R. L. (2001). Large diameter 718 ingots for land-based gas turbines. In Proceedings of the International Symposium on Superalloys and Various Derivatives (Vol. 1, pp. 57–70). Minerals, Metals and Materials Society. https://doi.org/10.7449/2001/superalloys_2001_57_70
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