Welding method for rotating shafts
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United States of America Patent
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-
Jan 25, 1994
Grant Date -
N/A
app pub date -
Oct 6, 1992
filing date -
Oct 6, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved welding method is provided for repairing rotating shafts, particularly cracked high pressure steam turbine rotors. The welding method preferably employs a 2.25Cr--1.0Mo--0.3V-type welding filler metal, preferably deposited using a narrow groove automatic gas tungsten arc welding technique. A narrow groove is formed in the rotor to remove the crack. The groove is preheated, filled with the welding filler metal, and postheated, resulting in a strong, high temperature resistant, long lasting weld.
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