Method of manufacturing rotor blade
AssigneeMitsubishi Jukogyo Kabushiki Kaisha
InventorsMasato Ueda, Takeshi Andoh
Life of this patent
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Abstract
A rotor blade is manufactured by making a soft alloy into a blade body with a curved section, joining a hard alloy to the leading edge of the blade body, coating the back side surfaces of the leading and trailing edge portions of the blade by alternately giving at least one coat each of a Ni-Cr-B-Si alloy and WC by spraying and fusing the coats onto the backing surfaces, and then coating the entire front side surface of the blade in the same way.
Claims5
A method of manufacturing a rotor blade having a leading edge and a trailing edge and said edges are connected by a curved body having a convex back side and a concave front side which comprises:
- making a soft iron-base alloy with good machinability and castability into said blade body with said curved configuration;
- joining a hard alloy to the leading edge of said blade body;
- providing a coating only on the leading edge and trailing edge surfaces of the convex back side of said blade body;
- and
- thereafter coating the entire surface of the concave front side of said blade body;
- said coatings being provided by first spraying a coating consisting essentially of a Ni-Cr-B-Si alloy onto said surfaces and then spraying a coating consisting essentially of tungsten carbide onto the deposit formed when said Ni-Cr-B-Si is sprayed onto said surfaces and then fusing said coatings onto said surfaces.
Dependencies are inferred from the claim text.