Turbine Blade, and Turbine Rotor and Steam Turbine Using the Turbine Blade
AssigneeMitsubishi Hitachi Power Systems, Ltd.
InventorsMasahiko ARAI, Hiroyuki DOI, Hideo YODA, Katsumi TANAKA
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Abstract
Disclosed is a turbine blade including a turbine blade substrate including an iron-base alloy; an erosion shield plate including a Co-base alloy; and a shim including a Ni—Fe alloy, in which the erosion shield plate is fixed to a leading edge of the turbine blade substrate with the shim therebetween by an electron beam welding. Thus, a turbine blade having a highly reliable, bonded portion of an erosion shield, and a turbine rotor and a steam turbine using the turbine blade are provided.
Claims13
A method for manufacturing a device which includes a turbine blade substrate including an iron-base alloy, an erosion shield plate including a Co-base alloy, and a shim including a Ni—Fe alloy, the method comprising:
- fixing the erosion shield plate to the leading edge of the turbine blade substrate with the shim using a single pass of electron beam injection, wherein
- the shim has a larger width on an electron-beam injection side than a width on a back side of the shim,
- the shim being disposed in a groove between the leading edge of the turbine blade substrate and the erosion shield plate.
Dependencies are inferred from the claim text.