| 摘要 |
PROBLEM TO BE SOLVED: To improve fatigue strength by making a metallic coating along a front edge and a rear edge except for the front edge and the rear edge in the vicinity of the platform of a turbine blade. SOLUTION: A hollow turbine blade 2 for a gas turbine engine has an end part 4, a root part 6 and a blade area 8 arranged between the end part 4 and the root part 6, and the blade area 8 also has a positive pressure surface 10 and a negative pressure surface 12. In this case, a coating 18 is applied to a part of the front edge 16 and rear edge 14 of the blade 2, and the coating 18 is preferably not extended over the whole length of the front edge 16 and rear edge 14. The coating 18 is thusly not formed to the bottom parts of the front edge 16 and rear edge 14 is the neighborhood of a platform 22, thereby the fatigue characteristics of the blade 2 can be improved by a simple method. |
