The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2000
Filed:
Jun. 29, 1998
Karl Rudolph Anderson, III, Naperville, IL (US);
Gerald Richard Crawmer, Clifton Park, NY (US);
Edward Kenneth Ellis, Bangor, ME (US);
John Francis Nolan, Latham, NY (US);
Louis Patrick Earvolino, Holliston, MA (US);
Robert Ellis Seeley, Broadalbin, NY (US);
Joseph John Pepe, Ballston Lake, NY (US);
Robert Joseph Christoffel, Schenectady, NY (US);
Joseph Louis Van Ullen, Loudonville, NY (US);
General Electric Co., Schenectady, NY (US);
Abstract
A method for repairing the rim of a steam turbine rotor, and a weld material for repairing such rotors. The method generally includes the steps of removing a damaged rim and its associated dovetail region, so as to form a surface at the perimeter of the rim portion. A weld repair region is then formed on the surface, which is machined to reconstruct the rim portion and the dovetail region exclusively with the weld repair region. Thereafter, an appropriately configured blade is secured to the rim portion with the dovetail region. The method is particularly intended for the repair of a steel alloy rotor, such as a NiCrMoV, NiMoV and CrMoV alloy, while the weld repair is formed with a nickel-base superalloy whose mechanical and thermal properties are compatible with the repair method and the steel alloy over a broad temperature range.