B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 26/36 (2006.01) B23P 6/04 (2006.01)
Patent
CA 2724620
A method is described, for treating a superalloy substrate (32) which includes at least one cavity (33) containing adherent metal oxide material on its surface (31). A short-pulsed, high repetition rate laser beam (46) is directed against the cavity surface for a period of time sufficient to remove substantially all of the adherent metal oxide material. The laser beam (46) is characterized by a peak power density in the range of about 10 megawatts/cm2 to about 10 gigawatts/cm2. In another embodiment, a high-power, short-pulsed, high repetition rate laser beam is directed to a region (62) on the substrate (64) which includes the cavity (60), under laser operational conditions which are capable of cutting into the superalloy material; so that a boundary region (66) is formed within the substrate, which encloses the cavity. The cavity can be a crack in a turbine blade, and the crack (60) can be repaired after treatment, by welding, or by another suitable technique.
Gupta Bhupendra Kumar
Jones Marshall Gordon
Qi Huan
Company General Electric
Craig Wilson And Company
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