摘要:
A method of forming a metal coating on surfaces of internal passages of a turbine blade, the turbine blade having an outer surface and comprising at least one internal passage. The method includes injecting a paint into at least one of the internal passages of the turbine blade, and heat treating the turbine blade such that an aluminide coating is deposited on the surface of the at least one internal passage.
摘要:
A method for repairing a turbine component includes identifying a crack in a surface of the component and applying a fluoride mixture to the surface of the component containing the crack. The method also includes exposing the portion of the component including the fluoride mixture to a controlled atmosphere and returning the repaired surface of the component to predetermined dimensions.
摘要:
A chemically-nonreactive, electrically-nonconductive shield having a recess generally corresponding to the shape of an airfoil portion to be positioned therein. The shield is submerged in an electroplating solution in a plating tank. The recess in the shield is sized to provide a predetermined, closely-spaced apart clearance between walls of the recess and the adjacent airfoil portion sufficient to reduce the flow rate of an electrolyte present in the electroplating solution between walls of the recess and the adjacent airfoil portion. The clearance permits control of the amount of electroplating that is deposited on the portion of the airfoil that is positioned in the recess in relation to portions of the airfoil not positioned in the recess.
摘要:
A method of removing an oxide layer from a surface of a metallic component, includes: contacting the surface with an alkaline cleaner, followed by contacting the surface with an acidic solution. The method is especially useful for removing oxide layers from the interior of hollow gas turbine engine components. The cleaned surface may be provided with an oxide-resistant coating by a pack aluminide coating process.
摘要:
Methods and apparatus of fabricating gas turbine engine components are provided. The method includes positioning a non-consumable shield adjacent to an edge of the component such that a gap is defined between the shield and the component, wherein the shield and gap form a fluid flow restriction adjacent to the edge, and inducing an electrical current from an anode to the component through an electrolyte bath such that a coating is applied to the component.
摘要:
A method is provided for electroplating a high temperature coating onto an airfoil. The method includes providing a shield having a recess defining one or more walls conforming to the shape of at least a portion of a pressure side and a suction side of the airfoil to be electroplated, introducing the portions of the pressure side and the suction side of the airfoil to be electroplated into the recess of the shield, attaching an anode and cathode to the airfoil, submerging at least the shield and the portions of the pressure side and the suction side of the airfoil to be electroplated into an electroplating tank containing an electrolyte, and electroplating a coating of a high temperature resistant metal onto the portions of the pressure side and the suction side of the airfoil to be electroplated to a predetermined minimum thickness.
摘要:
A chemical vapor deposition apparatus comprises a heating element capable of emitting electromagnetic radiation; a retort positioned relative to the heating element to receive the electromagnetic radiation; an encasing member at least partially disposed around the retort, the encasing member comprising a material that is at least partially transparent to the electromagnetic radiation; a plenum defined at least in part by an inner surface of the encasing member and an outer surface of the retort; and a furnace box at least partially disposed around the encasing member and the retort, and housing the heating element.
摘要:
Methods for making a leading edge protective strip for a composite airfoil including utilizing a cold spray deposition system to deposit a protective strip onto a leading edge of the composite airfoil.
摘要:
A nickel-base braze material suitable for closing holes in a high temperature component, such as a tip cap hole in a turbine blade. The braze material comprises first and second filler materials and a binder. The first filler material comprises particles of a first alloy, and the second filler material comprises particles of at least a second alloy having a lower melting temperature than the first alloy. The second alloy consists essentially of, by weight, about 8 to about 23 percent chromium, about 4 to about 18 percent cobalt, about 1.5 to about 6.0 percent tantalum, about 1.0 to about 6.0 percent aluminum, about 0.3 to about 1.5 percent boron, about 2.0 to about 6.0 percent silicon, up to 0.2 percent carbon, the balance being nickel and incidental impurities.
摘要:
A chemically-nonreactive, electrically-nonconductive shield having a recess generally corresponding to the shape of an airfoil portion to be positioned therein. The shield is submerged in an electroplating solution in a plating tank. The recess in the shield is sized to provide a predetermined, closely-spaced apart clearance gap between walls of the recess and the adjacent airfoil portion sufficient to reduce the flow rate of an electrolyte present in the electroplating solution between walls of the recess and the adjacent airfoil portion. The clearance gap permits control of the amount of electroplating that is deposited on the airfoil portion that is positioned within the recess in relation to portions of the airfoil not positioned within the recess.