US 6,536,110 B2 · Integrally bladed rotor airfoil fabrication and repair techniques

Abstract

The present invention relates to a method for-fabricating an integrally bladed rotor which comprises providing a hub section, preferably formed from a titanium based alloy, and welding an airfoil, also preferably formed from a titanium based alloy, to the hub section. The method further comprises partially aging and cooling the hub section prior to welding and aging the airfoil and the weld joint between the airfoil and the hub section subsequent to welding. The post welding aging step is preferably carried out using a novel encapsulated local airfoil heating device having a plurality of heating elements woven into a jacket made from a high temperature cloth material. The method of the present invention may also be used to repair integrally bladed rotors.

Claims17

Dependent claims

A method for creating an integrally bladed rotor comprising the steps of:

providing a hub section formed from a metal alloy;
welding an airfoil formed from a metal alloy to said hub section;
partially aging at least one of said hub section and said airfoil at a temperature in the range of from about 1075° F. to about 1125° F. for a time period in the range of from about 2 hours to about 8 hours prior to said welding step;
and
aging said airfoil and a weld joint between said airfoil and said hub section subsequent to said welding step at a temperature in the range of 1275° F. to 1325° F. for a time period in the range of about 1 hour to about 4 hours.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/836,009Filed 17 Apr 2001

Published

US 2003/0000602 A12 Jan 2003

Granted

25 Mar 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

F01D 5/34
Blades; Blade-carrying members ; Heating, heat-insulating, cooling or antivibration means on the blades or the members: rotor-blade aggregates of…
B23P 6/005
Repairing turbine components, e.g. moving or stationary blades, rotors,: using only replacement pieces of a particular form
B23P 15/006
Making specific metal objects by operations not covered by a single other subclass or a group in this subclass: turbine wheels
C22F 1/183
High-melting or refractory metals or alloys based thereon: of titanium or alloys based thereon

Integrally bladed rotor airfoil fabrication and repair techniques

Life of this patent

Integrally bladed rotor airfoil fabrication and repair techniques

Life of this patent

Abstract

Claims17