Coated superalloy gas turbine components

Details Coated superalloy gas turbine components Coated superalloy gas turbine components

1983-03-28

1987-06-30

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428679, 428680, 428685, B32B 1504

Patent

active

046770348

ABSTRACT:
Low temperature regime hot corrosion of superalloy components in gas turbines is reduced by the application thereover of cobalt-chromium alloys, the chromium content of such coatings (final composition) being in the 37.5-50 weight percent range. To the extent practicable, aluminum content in these coatings is kept to a minimum. In any event, during the annealing step some small amount at least of aluminum migrates from the superalloy into the coating. At completion of the annealing operation, the alluminum content at the exterior surface of the final coating, however, is to be less than the concentration of aluminum that will form a continuous film of aluminum oxide.

REFERENCES:
patent: 3652235 (1972-03-01), Manilla et al.
patent: 3664765 (1972-05-01), Ishimatsu et al.
patent: 3676085 (1972-07-01), Evans et al.
patent: 3873347 (1975-03-01), Walker et al.
patent: 3957454 (1976-05-01), Bessen
patent: 3993454 (1976-11-01), Giggins, Jr. et al.
patent: 3998603 (1976-12-01), Rairden
patent: 4024294 (1977-05-01), Rairden, III
patent: 4101713 (1978-07-01), Hirsch et al.
patent: 4101715 (1978-07-01), Rairden
"Operational Performance and Maintenance Improvement", Section 6 of Final Report No. 74GTD57 (under Contract 0-35510 with the U.S. Maritime Administration), Nov. 1, 1974, pp. 6-1, 6-7, 6-8, 6-21, 6-27, 6-29, 6-31, and 6-32.
Report Under Contract N00173-77-C-0253-"A Study of the Mechanism of Hot Corrosion in Environments Containing NaCl: Task 1: Pitting, Task 2: Galvanic Coupling", [Nov. 1979, pp. 16, 17 & FIG. 11].
"Low Temperature Hot Corrosion of Cobalt-Base Alloys", (Parts I & II), [Metallurgical Transactions A, vol. 13A, Oct. 1982, pp. 1843-1864].
S. B. Shepard-"Navsea Marine Gas Turbine Materials Development Program", [Naval Engineers Journal, Aug. 1981, pp. 65-75].
"Low- and High- Temperature (1300 and 1650 F) Burner Rig Tests of MCrAlY Composition Variations" by Louis F. Aprigliano [David W. Taylor Naval Ship Research and Development Center-Report DTNSRDC/SME-79/35, Aug. 1979, pp. 9, 12 and 13].
"Metallic Coating Development and Evaluation Program" [Report under Contract No. N00024-78-C-5337 for Naval Sea Systems Command, Dept. of Navy, Nov. 1979, pp.4, 5 and 31].

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