| 摘要 |
PURPOSE:To ensure excellent resistance to erosion by welding an erosion shield plate which is made of titanium family alloy and is formed with a hardened layer produced by diffusion treatment after aluminum coating, to the blade tip leading edge of a turbine blade made of titanium family alloy. CONSTITUTION:An erosion shield plate 2 made of titanium family alloy is welded to the blade tip leading edge of a turbine blade 1 made of titanium family alloy. In this case, the erosion shield plate 2 is formed into a predetermined shape, and after at least its outer surface is coated with aluminum. It receives diffusion treatment for diffusing aluminum into titanium family alloy to combine thereof with titanium so as to produce a hardened layer provided with precipitation of Ti and Al having high hardness value. And then the erosion shield plate 2, on the surface of which the hardened layer is produced, is welded to the blade tip leading edge of the turbine blade 1 made of titanium family alloy.
|
