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Method of repairing shrouded turbine blades with cracks in the vicinity of the outer shroud notch

  • US 7,934,315 B2
  • Filed: 08/11/2006
  • Issued: 05/03/2011
  • Est. Priority Date: 08/11/2006
  • Status: Active Grant
First Claim
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1. A method of repairing a damaged notch fillet radius of a turbine blade shroud, the method comprising:

  • blending out the damaged notch fillet radius, wherein the damaged notch fillet radius has a depth greater than about 0.03 inches from an edge of the notch fillet radius and a maximum depth of about 0.1 inches from the edge of the notch fillet radius;

    removing a hardface structure positioned proximate the damaged notch fillet radius;

    forming a replacement notch fillet radius with weld filler comprising a first material; and

    welding a hardface nugget comprising a second different material to at least a portion of the replacement notch fillet radius.

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