| 摘要 |
PURPOSE:To improve corrosion resistance of a joining part by forming the blade top part, which makes contact with a tenon and a shroud, and adjacency of a hole, for the tenon to be fitted in, of the shroud by nickel radical alloy. CONSTITUTION:Build up welding is performed on the top part 4 of a blade 1 by nickel radical alloy welding metal such as inconel or the like. The similar welding is performed on a part of a shroud 3 in contact with the blade 1 and also connection part 5 between the shroud 3 and a tenon. In a condition where the shroud 3 is combined with the blade 1, fit-in part 6 of the shroud 3 is filled up through welding of nickel radical alloy to form the tenon. Thus, corrosion resistance of the joining part of the tenon with the shroud can be improved.
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