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Method and apparatus for repairing metal in an article

  • US 4,743,733 A
  • Filed: 10/01/1984
  • Issued: 05/10/1988
  • Est. Priority Date: 10/01/1984
  • Status: Expired due to Term
First Claim
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1. In a method for repairing an article having an article portion of a metallic material, the steps of:

  • concurrently applying to the article portion a laser beam and a powder comprising metal powder;

    the metal powder being of a composition substantially the same as the metallic material of the article portion;

    the laser being applied, at a laser beam spot, to the powder and the article portion beneath the powder in a power density range of 104 to 106 watts per square centimeter to melt both the metal powder and material of the article portion to generate a molten interaction zone from the metal powder and the metallic material of the article portion, whilemaintaining an interaction time in the range of 0.005-2 seconds between the beam and the powder and article portion beneath the powder thereby reducing the heat affected zone in the article portion and providing a repair layer on the article portion consolidated from the powder and metallic material of the portion.

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