Turbine blade repair

Metal fusion bonding – Process – Repairing – restoring – or renewing product for reuse

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Details

291568B, 2940218, 228231, 228232, B23P 1502

Patent

active

046117440

ABSTRACT:
A method of repairing turbine blades including a repair step which involves the application of substantial thermal energy to the blade such as a welding or brazing operation includes a pre-heating step in which the blade is heated to a predetermined temperature in a controlled manner. The controlled heating may be continued both during the repair step involving the application of substantial thermal energy and after the repair step in order to minimize stress in the blade due to the application of considerable thermal energy to the blade.

REFERENCES:
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patent: 3045098 (1962-07-01), Norton
patent: 3246392 (1966-04-01), Altgelt
patent: 3535768 (1970-10-01), Pruitt et al.
patent: 3574924 (1971-04-01), Dibble
patent: 3660882 (1972-05-01), Widowitz et al.
patent: 4141127 (1979-02-01), Cretella et al.
patent: 4176433 (1979-12-01), Lee et al.
patent: 4498617 (1985-02-01), Guertin et al.
Baker, "Molten Metal Flood-the Basis for Large-Scale Repairs", Welding and Metal Fabrication, Jun. 1981, pp. 257-260.
P. T. Houldcroft--"Welding Process Technology", 1977--Line 18, p. 257 and Paragraph 3, p. 296.
D. Romans & E. N. Simons, "Welding Process & Technology ", Lines 1-5, p. 217', p. 235, pp. 7-11, p. 248.

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