Cobalt-based alloy for the coating of organs subject to erosion by liquid
AssigneeNuovo Pignone Holding S.p.A.
InventorMassimo Giannozzi
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Abstract
The present invention relates to a cobalt-based alloy for the coating of organs subject to erosion by liquid comprising chromium 28-32% by weight, tungsten 6-8% by weight, silicon 0.1-2% by weight, carbon 1.2-1.7% by weight, nickel 3-6% by weight, molybdenum 1-3%, cobalt the complement to 100%. The invention also relates to an application method of the alloy on organs subject to erosion by liquid, in particular vapour turbine blades, to reduce the metal erosion rate following impact with liquids.
Claims19
A method for the treatment of organs subject to erosion, comprising the application of a cobalt-based alloy on the surface of said organ to form a layer of antierosion coating, characterized in that said alloy comprises:
- 4 chromium 28-32% by weight tungsten 6-8% by weight silicon 0.1-2% by weight carbon 1.2-1.7% by weight nickel 3-6% by weight molybdenum 1-3% by weight cobalt the complement to 100% by weight.
A cobalt-based alloy for the coating of organs subject to erosion by liquids, characterized in that it comprises:
- 5 chromium 28-32% by weight tungsten 6-8% by weight silicon 0.1-2% by weight carbon 1.2-1.7% by weight nickel 3-6% by weight molybdenum 1-3% by weight cobalt the complement to 100% by weight.
Dependencies are inferred from the claim text.