B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
75/122, 26/150,
B23K 35/30 (2006.01) B23P 6/00 (2006.01) C21D 9/50 (2006.01) C22C 38/08 (2006.01)
Patent
CA 1290565
ABSTRACT OF THE DISCLOSURE This is an improved process for weld repairs to a nickel-molybdenum-vanadium steel steam turbine rotor. One or more weld passes are made using a filler metal to repair a defect in the rotor. The improvement comprises a repair method for a rotor using a filler metal alloy consisting essentially of by weight percent 0.090-1.110 carbon, 1.25-1.80 manganese, up to 0.0010 phosphorus, up to 0.010 sulfur, 0.20-0.50 silicon, 1.40-2.10 nickel, up to 0.30 chromium, 0.25-0.55 molybdenum, up to 0.05 vanadium, up to 0.10 titanium, up to 0.10 zirconium, up to 0.10 aluminum, up to 0.20 copper, up to 0.0015 antimony, up to 0.015 tin, up to 0.020 arsenic, and, up to, in ppm, 35 oxygen, 25 nitrogen, and 10 hydrogen, the balance being iron. This alloy is vacuum induction melted. Preferably this alloy has 0.10-0.25 chromium and a maximum of 0.010 zirconium. Welds using this filler metal exceed the rotor base materi- al in strength, notch toughness, and resistance to temper embrittlement.
506763
Amos Dennis R.
Clark Robert E.
Friedman Lawrence M.
Amos Dennis R.
Bereskin & Parr
Clark Robert E.
Friedman Lawrence M.
Westinghouse Electric Corporation
LandOfFree
High strength high toughness welding for steam turbine rotor... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High strength high toughness welding for steam turbine rotor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High strength high toughness welding for steam turbine rotor... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1269333