High performance nickel-based alloy
AssigneeL.E. Jones Company
InventorsCong Yue Qiao, Lawrence A. Bowsher, Daniel E. Ward, Scott A. Smith
Life of this patent
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Abstract
A nickel-based alloy includes, in weight percent, carbon from about 0.7 to about 2%; manganese up to about 1.5%; silicon up to about 1.5%; chromium from about 25 to about 36%; molybdenum from about 5 to about 12%; tungsten from about 12 to about 20%; cobalt up to about 1.5%; iron from about 3.5 to about 10%; nickel from about 20 to about 55%; and incidental impurities. The alloy is suitable for use in elevated temperature applications such as in valve seta inserts for internal combustion engines.
Claims8
A nickel-based alloy comprising, in weight percent:
- carbon from about 0.7 to about 2%;
- manganese up to about 1.5%;
- silicon up to about 1.5%;
- chromium from about 25 to about 36%;
- molybdenum from at least 6.5 to about 12%;
- tungsten from about 12 to about 20%;
- cobalt up to about 1.5%;
- iron from about 3.5 to about 10%;
- nickel from about 20 to about 55%;
- and
- incidental impurities, the alloy having an as-cast bulk hardness of over 52 HRc and a microstructure comprising eutectic reaction phases having a lamellar morphology and at least about 95 volume percent of the eutectic reaction phases and the microstructure is free of primary carbide phases.
A nickel-based alloy consisting essentially of, in weight percent, carbon from about 0.7 to about 2%;
- manganese up to about 1.5%;
- silicon up to about 1.5%;
- chromium from about 25 to about 36%;
- molybdenum from at least 5 to about 12%;
- tungsten from about 12 to about 20%;
- cobalt up to about 1.5%;
- iron from about 3.5 to about 10%;
- nickel from about 20 to about 55%;
- and incidental impurities, the alloying having an as-cast bulk hardness of over 52 HRc and a microstructure comprising eutectic reaction phases having a lamellar morphology and at least about 95 volume percent of the eutectic reaction phases and the microstructure is free of primary carbide phases.
Dependencies are inferred from the claim text.