Fabrication of cast articles from high melting temperature superalloy compositions

  • US 5,071,054 A
  • Filed: 12/18/1990
  • Issued: 12/10/1991
  • Est. Priority Date: 12/18/1990
  • Status: Expired due to Fees
First Claim
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1. A process for preparing a high-melting temperature superalloy article from a non-castable high-melting temperature superalloy, comprising the steps of:

  • casting non-castable superalloy;

    identifying a primary defect in the superalloy article;

    excising the primary defect and a portion of metal around the defect to create an excised volume at the surface of the article;

    filling the excised volume with a filler metal;

    smoothing filler metal defects and removing oxide at the surface of the filler metal;

    applying a mixture of a binder and a cladding powder to the surface of the filler metal;

    heat treating the article to remove the binder, and to melt and solidify the cladding powder; and

    hot isostatically pressing the article.

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