Metal fusion bonding – Process – Repairing – restoring – or renewing product for reuse
Patent
1992-10-06
1994-01-25
Bradley, Paula A.
Metal fusion bonding
Process
Repairing, restoring, or renewing product for reuse
228165, 228231, 228232, 2940207, 219 7614, B32K 3102, B23P 604
Patent
active
052808491
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.
REFERENCES:
patent: 2276190 (1942-03-01), Gunnert
patent: 4503129 (1985-03-01), Okuda et al.
patent: 4633554 (1987-01-01), Clark et al.
patent: 4896814 (1990-01-01), Allain et al.
patent: 4897519 (1990-01-01), Clark et al.
patent: 4902888 (1990-02-01), Clark et al.
patent: 4994647 (1991-02-01), Tanaka et al.
patent: 5049716 (1991-09-01), Dunmire et al.
"Preheating for Welding," Reprinted from The Welding Journal, Apr., 1977 (as Dated by Office).
U.S. Application 06/727,175 (ABD), Filed Apr. 25, 1985, pp. 1-9, Incorp. By Ref. In U.S. Pat. No. 4,633,554, Patented Jan. 6, 1987.
Article--"Weldability Studies in Cr-Mo-V Turbine Rotor Steel", by Kim et al., Journal of Materials Engineering, vol. 10, No. 2, 1988.
Bradley Paula A.
Commonwealth Edison
Knapp Jeffrey T.
LandOfFree
Welding method for rotating shafts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Welding method for rotating shafts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Welding method for rotating shafts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-722232