| 摘要 |
A method of restoring the shroud of a turbine blade which has become worn, and particularly those edges of the shroud in the vicinity of what is commonly known as the Z-notch, which comprises the steps of grinding down the shroud in the vicinity of said notch to an accurately predetermined dimension with respect to the original geometry of the shroud, placing the blade in a fixture having a masking member with a slot in it, such that the Z-notch of the blade is disposed substantially in alignment with the slot, and depositing, by means of a plasma spray, a metal alloy onto those edges in an amount just sufficient to build up the same essentially to their original dimensions. Following the plasma spraying, the built-up edges are sintered at a temperature on the order of 1900 DEG F. or more, to more firmly bond the built-up layer to the base metal. The blade is then cooled. The resulting edges conform so closely to the original geometry of a new blade that no additional refinishing or grinding operations are normally required after the sintering.
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