Method for repairing superalloy castings using a metallurgically bonded tapered plug
First Claim
1. A mating plug member for filling an aperture in a cast article, said mating plug member comprising mating engagement means for matingly engaging and allowing insertion of said mating plug member within said aperture upon alignment of said mating plug member.
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Abstract
A method of repairing cracks, imperfections, and the like in a cast article. A frusto-conical aperture is created in the article in the location of the crack or imperfection. A mating tapered plug is prepared such that the tapered plug can fit into the aperture so that the sloped side walls of the tapered plug evenly and unilaterally rest on frusto-conical sides of the aperture. The tapered plug is disposed into the aperture, and bonding material is applied between the surfaces of the tapered plug and the aperture, before or after insertion of the tapered plug into the aperture. The article is thereafter heated such that the bonding material joins the surfaces of the tapered plug and the aperture. The outer end of the tapered plug thereafter is polished so that such outer end is approximately level with the article'"'"'s outer side in a refinement of the invention, the plug member may be pushed into the aperture such that a controlled interference fit is produced.
46 Citations
22 Claims
- 1. A mating plug member for filling an aperture in a cast article, said mating plug member comprising mating engagement means for matingly engaging and allowing insertion of said mating plug member within said aperture upon alignment of said mating plug member.
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6. A cast article, said cast article comprising:
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a) at least one wall formed from a superalloy, said at least one wall having a thickness;
b) an aperture extending through said wall, wherein said aperture has sloped side walls; and
c) a mating plug member formed from a second superalloy and disposed in said aperture, said mating plug member comprising mating engagement means for matingly engaging and allowing insertion of said mating plug member within said aperture upon alignment of said mating plug member, and wherein said sloping side walls of said first half member and said second half member mutually overlie and evenly abut said sloped side walls of said aperture. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification