Patent ID: 8496990
Filing Date: 2013-07-30
Classification: B23P,C23C,F01D,F05D

Abstract:
1. A method of locally repairing a coating on an article comprising the steps of: a) removing a damaged portion of the coating from a portion of the article, b) removing any oxidized layer from the portion of the article, c) placing the material on the portion of the article, d) heat treating the material to form a patch coating on the portion of the article and to bond the patch coating to the portion of the article and to the coating adjacent to the patch coating, and e) impinging an energy beam on the coating or the patch coating and moving the energy beam from a periphery of the patch coating to a periphery of the coating adjacent to the patch coating and back in a zig-zag pattern or moving the energy beam from the periphery of the patch coating to the periphery of the coating adjacent to the patch coating to form a cross-hatch pattern, to uniformly heat the periphery of the patch coating and the periphery of the coating adjacent to the patch coating; wherein the coating is selected from the group consisting of nickel aluminide coating, a platinum aluminide coating, a chromium aluminide coating, a silicon aluminide coating, and a MCrAlY coating, wherein M is one or more of Fe, Co and Ni.