| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive steam turbine stator blade without using alloy coating such as thermal spray and a sintered body, which is excellent in oxidation resistance, and of which efficiency is not decreased even after operation for a long period of time. Ž<P>SOLUTION: A turbine blade uses stainless steel containing 8-15 mass% of chromium as base material, and has an oxide film on a surface of the base material. Members constituting the turbine blade are formed by processing a forging material. After surfaces of the members are polished to be 0.5a or less in surface roughness and the polished members are welded to be in a shape of a turbine stator blade, thermal processing is performed at an actual operation temperature or more. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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