| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for repairing a stationary shroud already in service. <P>SOLUTION: A stationary shroud 24 of a gas turbine engine made of a base metal is repaired by removing any damaged material from a flow-path region 40 of the stationary shroud 24, leaving an initially exposed base-metal flow-path surface 70; and applying a base-metal restoration 72 overlying the initially exposed flow-path surface 70. The base-metal restorative material 72 is applied by furnishing a source of a structural material compatible with the base metal, in a form such as a powder or a wire, and depositing the source of the structural material overlying the initially exposed base-metal flow-path surface 70 of the stationary shroud 24 by laser cladding to form a repaired base-metal flow-path surface 76. An environmentally resistant rub coating 78 may be applied overlaying the base-metal restoration material 72. <P>COPYRIGHT: (C)2004,JPO |
