Turbine blade for steam turbine; has blade plate with blade foot and blade tip, where lower part of blade and foot are made of steel and upper part of blade and tip are of titanium or aluminium alloy

摘要

The turbine blade (1) has a blade plate (3) connected at its ends to a blade foot (2) and a blade tip (4). The turbine blade is made of different materials. A lower part (A) of the turbine blade, which includes the blade foot and, preferably, a part of the blade plate, is made of steel. An upper part (B) of the turbine blade, which extends as far as the blade tip, is made of a titanium or aluminium alloy.