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US5002731A
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Corrosion-and-wear-resistant cobalt-base alloy
Assignee: Haynes International Inc
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Filing: 1989-04-17
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Granted: 1991-03-26
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Expires: 2009-04-17
Abstract
Abstract Disclosed is a cobalt-base alloy that has a valuable combination of both corrosion- and wear-resistant properties. The alloy nominally contains, in percent by weight, 25.5 chromium, 8.5 nickel, 3.0 iron, 5 molybdenum, 2 tungsten, 0.40 silicon, 0.75 manganese, 0.06 carbon, 0.08 nitrogen and the balance cobalt plus normal impurities normally found in alloys of this class. The alloy may also contain copper and certain "carbide formers" (i.e., columbium, tantalum, titanium, vanadium and the like) to tie up excess carbon and/or nitrogen that may be present.
Inventors
- 👤 Paul Crook
- 👤 Aziz I. Asphahani
- 👤 Steven J. Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:42
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07; A; A61; A61F; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
An alloy consisting essentially of, in weight percent, 22 to 30 chromium, 4 to 16 nickel, up to 7 iron, up to 20 Ni+Fe, 3 to 10 molybdenum, up to 5.0 tungsten, 0.05 to 2.0 silicon, 0.05 to 2.0 manganese, 0.02 to 0.11 carbon, 0.03 to 0.12 nitrogen, 0.06 to 0.20 C+N, copper up to 3.0, elements in the group known as carbide formers up to 8 and the balance cobalt plus impurities wherein the molybdenum exceeds the tungsten content and the carbon and nitrogen contents are in effective amounts to provide the combination of corrosion and wear properties.
Claim 2
Dependent Claim
99 words
An alloy consisting essentially of, in weight percent, 22 to 30 chromium, 4 to 16 nickel, up to 7 iron, up to 20 Ni+Fe, 3 to 10 molybdenum, up to 5.0 tungsten, 0.05 to 2.0 silicon, 0.05 to 2.0 manganese, 0.02 to 0.11 carbon, 0.03 to 0.12 nitrogen, 0.06 to 0.20 C+N, copper up to 3.0, elements in the group known as carbide formers up to 8 and the balance cobalt plus impurities wherein the molybdenum exceeds the tungsten content and the carbon and nitrogen contents are in effective amounts to provide the combination of corrosion and wear properties.
Claim 3
Dependent Claim
51 words
The alloy of claim 1 containing 24 to 27 chromium, 7 to 10 nickel, 2 to 4 iron, 9 to 14 Ni+Fe, 4.5 to 5.5 molybdenum, 1.5 to 2.5 tungsten, 0.30 to 0.5 silicon, 0.50 to 1.0 manganese, 0.04 to 0.08 carbon, 0.06 to 0.10 nitrogen, and 0.10 to 0.18 C+N.
Claim 4
Dependent Claim
34 words
The alloy of claim 1 containing about 25.5 chromium, about 8.5 nickel, about 3.0 iron, about 5.0 molybdenum, about 2.0 tungsten, about 0.4 silicon, about 0.75 manganese, about 0.06 carbon, and about 0.08 nitrogen.
Claim 5
Dependent Claim
14 words
The alloy of claim 1 in the form of cast, wrought or powder products.
References Cited (Backward Citations)
US3865585A
Cited
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