Corrosion and wear resistant alloy
AssigneeThe Perkin-Elmer Corporation
InventorsSubramaniam Rangaswamy, John H. Harrington
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Abstract
A novel alloy is disclosed which is characterized by high resistance to wear and corrosion. The alloy consists essentially of 2 to 25% chromium, 5 to 30% molybdenum, 3 to 15% tungsten, 2 to 8% copper, 2 to 8% boron, and 0.2 to 2% carbon; the balance being incidental impurities and at least 30% of a metal selected from the group consisting of nickel, cobalt and combinations thereof, with the total of molybdenum and tungsten being at least 16%. The alloy is preferably in the form of a powder for thermal spraying, and coating produced thereby generally have an amorphous structure.
Claims12
An alloy characterized by high resistance to wear and corrosion, consisting essentially of, as percent by weight:
- 2 to 25% chromium,
- 5 to 30% molybdenum,
- 3 to 15% tungsten,
- 2.0 to 8% copper,
- 0.2 to 2.0% boron, and
- 0.2 to 2.0% carbon;
- the balance being incidental impurities and at least 30% of a metal selected from the group consisting of nickel, cobalt and combinations thereof;
- and the total of molybdenum and tungsten being at least 16%.
An alloy characterized by high resistance to wear and corrosion, consisting essentially of, as percent by weight:
- 15 to 23% chromium,
- 5 to 20% molybdenum,
- 5 to 12% tungsten,
- 3.0 to 5% copper,
- 0.5 to 1.5% boron,
- 0.5 to 1.5% carbon, and
- balance nickel and incidental impurities;
- the total of molybdenum and tungsten being at least 16%.
A thermal spray powder of an alloy characterized by ability to produce coatings having high resistance to wear and corrosion, consisting essentially of, as percent by weight:
- 15 to 23% chromium,
- 5 to 20% molybdenum,
- 5 to 12% tungsten,
- 3.0 to 5% copper,
- 0.5 to 1.5% boron,
- 0.5 to 1.5% carbon, and
- up to 0.5% iron;
- up to 7% total of one or more first elements selected from the group consisting of zirconium, tantalum, niobium, titanium, vanadium and hafnium;
- up to 3% total of one or more second elements selected from the group consisting of silicon, manganese, phosphorous, germanium, and arsenic;
- up to 2% total of rare earth elements;
- and
- balance nickel and incidental impurities;
- the total of molybdenum and tungsten being at least 16%.
Dependencies are inferred from the claim text.