Filler wire composition and method of welding turbine component with filter wire composition and its product thereof
AssigneeWestinghouse Electric Corp.
InventorsRobert E. Clark, Dennis R. Amos, Timothy L. Driver
Life of this patent
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Abstract
A filler wire weld composition is set forth which provides high yield strength characteristics comparable to a base substrate made from a high performance Ni--Cr steel alloy. The filler wire weld composition is useful for repair welding substrate alloys used commercially in contexts such as turbine components such as rotors and discs.
Claims20
A filler wire composition comprising iron and alloying elements selected from the group consisting of carbon, manganese, nickel, chromium, molybdenum, vanadium, phosphorus, silicon, and sulfur, wherein said alloying elements are present in amounts of:
- (a) greater than about 0.10 to about 0.12 weight percent carbon;
- (b) from about 1.65-1.85 weight percent manganese;
- (c) from about 1.90-2.10 weight percent nickel;
- (d) from about 0.50-0.60 weight percent chromium;
- (e) from about 0.48-0.63 weight percent molybdenum;
- and
- (f) from about 0.008-0.020 weight percent vanadium,
- wherein the balance is essentially iron.
A method of welding a turbine component, comprising:
- (a) welding a turbine component with a filler wire composition comprising iron and alloying elements selected from the group consisting of carbon, manganese, nickel, chromium, molybdenum, vanadium, phosphorus, silicon, and sulfur, wherein said alloying elements are present in an amount of:
- greater than about 0.10 to about 0.12 weight percent carbon;
- from about 1.65-1.85 weight percent manganese;
- from about 1.90-2.10 weight percent nickel;
- from about 0.50-0.60 weight percent chromium;
- from about 0.48-0.63 weight percent molybdenum;
- from about 0.008-0.020 weight percent vanadium,
- wherein the balance is essentially iron;
- and
- (b) heat treating the weld,
- wherein the weld comprising the filler wire has a 0.2% yield strength of at least 140 ksi after the heat treatment step.
A turbine containing a repair welded turbine component comprising:
- (a) a turbine component substrate;
- and
- (b) a weld on the turbine component substrate comprising a deposited filler wire weld material comprising iron and alloying elements selected from the group consisting of carbon, manganese, nickel, chromium, molybdenum, vanadium, phosphorus, silicon, and sulfur, wherein said alloying elements are present in an amount of:
- greater than about 0.10 to about 0.12 weight percent carbon;
- from about 1.65-1.85 weight percent manganese;
- from about 1.90-2.10 weight percent nickel;
- from about 0.50-0.60 weight percent chromium;
- from about 0.48-0.63 weight percent molybdenum;
- and
- from about 0.008-0.020 weight percent vanadium,
- wherein the balance is essentially iron;
- and
- wherein the weld has a 0.2% yield strength of at least 140 ksi.
Dependencies are inferred from the claim text.