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Title: Method of making a high temperature-low temperature rotor for turbines

Abstract

This patent describes a method of forming a turbine rotor from separate rotor segments comprised of different alloy materials. It comprises: providing a first rotor segment, of an alloy material, having a longitudinal axial center line, an outer surface, and a first end face, with a cavity in the first end face, extending radially from the axial center line of the first rotor segment to a location spaced from the outer surface thereof, forming a first axially extending annular flange having an axially facing surface; providing a second rotor segment, of another alloy material, having a longitudinal axial center line, an outer surface, and a second end face, with a cavity in the second end face, extending radially from the axial center line of the second rotor segment to a location spaced from the outer surface thereof forming a second axially extending annular flange having an axially facing surface; welding a clad layer of filler material onto the axially facing surface of the annular flange of the first end face, with a portion thereof extending beyond the outer surface of the first rotor segment; machining the clad layer so applied to provide a smooth surface thereon; heat treating the appliedmore » layer and contiguous section of the annular flange of the first rotor segment; aligning the first and second rotor segments with the end faces confronting each other and the annular flanges in spaced adjacent relationship to provide a welding root opening therebetween; welding the first and second rotor segments together across the welding root opening to form a juncture weld, with a portion of the weld extending beyond the outer surfaces thereof; heat treating the juncture weld; and machining the juncture weld.« less

Inventors:
; ;
Publication Date:
OSTI Identifier:
6391417
Patent Number(s):
US 4962586; A
Application Number:
PPN: US s 7-442966
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (USA)
Resource Type:
Patent
Resource Relation:
Patent File Date: 29 Nov 1989
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 36 MATERIALS SCIENCE; ROTARY ENGINES; MATERIALS TESTING; ALLOYS; HIGH TEMPERATURE; LOW TEMPERATURE; TURBINES; WELDING; ENGINES; FABRICATION; HEAT ENGINES; INTERNAL COMBUSTION ENGINES; JOINING; MACHINERY; TESTING; TURBOMACHINERY; 330104* - Internal Combustion Engines- Rotary; 330103 - Internal Combustion Engines- Turbine; 360101 - Metals & Alloys- Preparation & Fabrication

Citation Formats

Clark, R E, Novak, R L, and Amos, D R. Method of making a high temperature-low temperature rotor for turbines. United States: N. p., 1990. Web.
Clark, R E, Novak, R L, & Amos, D R. Method of making a high temperature-low temperature rotor for turbines. United States.
Clark, R E, Novak, R L, and Amos, D R. Tue . "Method of making a high temperature-low temperature rotor for turbines". United States.
@article{osti_6391417,
title = {Method of making a high temperature-low temperature rotor for turbines},
author = {Clark, R E and Novak, R L and Amos, D R},
abstractNote = {This patent describes a method of forming a turbine rotor from separate rotor segments comprised of different alloy materials. It comprises: providing a first rotor segment, of an alloy material, having a longitudinal axial center line, an outer surface, and a first end face, with a cavity in the first end face, extending radially from the axial center line of the first rotor segment to a location spaced from the outer surface thereof, forming a first axially extending annular flange having an axially facing surface; providing a second rotor segment, of another alloy material, having a longitudinal axial center line, an outer surface, and a second end face, with a cavity in the second end face, extending radially from the axial center line of the second rotor segment to a location spaced from the outer surface thereof forming a second axially extending annular flange having an axially facing surface; welding a clad layer of filler material onto the axially facing surface of the annular flange of the first end face, with a portion thereof extending beyond the outer surface of the first rotor segment; machining the clad layer so applied to provide a smooth surface thereon; heat treating the applied layer and contiguous section of the annular flange of the first rotor segment; aligning the first and second rotor segments with the end faces confronting each other and the annular flanges in spaced adjacent relationship to provide a welding root opening therebetween; welding the first and second rotor segments together across the welding root opening to form a juncture weld, with a portion of the weld extending beyond the outer surfaces thereof; heat treating the juncture weld; and machining the juncture weld.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {10}
}