STEAM TURBINE VANE MANUFACTURING METHOD

摘要

This steam turbine vane manufacturing method is provided with the following steps: a groove processing step for forming a protective part connecting surface (14) on a steam turbine vane material (11) that was subjected to rough processing; a build-up welding step for forming, by build-up welding, a protective part build-up bead (15) on the protective part connecting surface (14); and a processing step for performing processing, by cutting the steam turbine vane material (11) that was subjected to rough processing and the protective part build-up bead (15), to finish the steam turbine vane material (11) that was subjected to rough processing so that the same becomes a steam turbine vane material (16) that was subjected to finishing processing. In this case, the steam turbine vane material (11) that was subjected to rough processing is larger than the steam turbine vane material (16) that was subjected to finishing processing. As compared to other steam vane manufacturing methods for forming the protective part build-up bead (15) by build-up welding after the steam turbine vane material (11) that was subjected to rough processing is subjected to finishing processing, this steam turbine vane manufacturing method can make the deformation amount of a welding substrate deformed by build-up welding smaller, and can appropriately produce a steam turbine vane.