Process for repair of drive blades such as turbine blades
December 12, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMold bottom and stool protector construction Turbine engine seal and method for repair thereof Method for restoring a face on the shroud of a rotor blade Alloy and methods of use thereof Method of rehabilitating propeller hub bodies Method of making and repairing turbine blades Weld repairable combustor Method of repairing or modifying turbine blades Integrally bladed rotor fabrication or repair Patent #: 5109606 InventorsAssigneeApplicationNo. 806877 filed on 12/12/1991US Classes:29/889.1, Repairing or disassembling29/402.07, And by a metallurgical operation, e.g., welding, diffusion bonding, casting29/402.18, By applying fluent material, e.g., coating, casting164/103PreheatingExaminersPrimary: Cuda, IreneAttorney, Agent or FirmForeign Patent References
International ClassB23P 015/02Foreign Application Priority Data1990-12-13 DEAbstractA process for the repair of single-crystal drive blades, such as turbine blades, in which a sound portion of the blade is inserted into an open bottom of a casting mold in communication with a casting cavity in the mold adopted to the shape of the blade. The molten metal is then cast into the mold to unite with the sound portion and an epitaxial single-crystal solidification of the melt is produced on the sound portion to form the entire blade. A part of the sound portion has an outer surface layer thereof removed to expose a core region which is constituted of substantially pure single crystal material prior to casting. The sound part is secured in a holder which is coupled to the casting mold for only a matter of seconds before the molten metal is cast into the mold.Field of SearchRepairing or disassemblingBy applying fluent material, e.g., coating, casting Metallurgically attaching preform Including reconditioning of part And by a metallurgical operation, e.g., welding, diffusion bonding, casting Repairing Including preconditioning preform Preheating Of preform in mold Means applying vacuum or suction directly to molten casting material Including melting chamber receptacle | |
