Corrosion and wear resistant iron based alloy useful for internal combustion engine valve seat inserts and method of making and use thereof
AssigneeL. E. Jones Company
InventorsCong Yue Qiao, David M. Doll
Life of this patent
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Abstract
An iron-based corrosion resistant and wear resistant alloy includes (in weight percentage) carbon from about 1.6 to 3%, silicon from about 0.8 to 2.1%, manganese up to 1.0%, chromium from about 12.0 to 15.0%, molybdenum from about 2.0 to 4.0%, nickel from about 0.2 to 0.8%, copper up to 4.0%, boron up to 0.5%, and the balance including iron and incidental impurities. The alloy is suitable for use in elevated temperature applications such as in valve seat inserts for combustion engines.
Claims22
An iron-based alloy having a copper precipitation strengthening mechanism comprising, in weight percentage:
- carbon from about 1.6 to 3.0%;
- silicon from about 0.8 to 2.1%;
- manganese up to 1.0%;
- chromium from about 12.0 to 15.0%;
- molybdenum from about 2.0 to 4.0%;
- nickel from about 0.2 to 0.8%;
- copper from about 0.4 to 4.0%;
- phosphorus from about 0.005 to about 0.015%;
- boron from about 0.15 to 0.5%;
- and
- balance iron and incidental impurities;
- wherein the alloy has a microstructure comprising tempered martensite.
A valve seat insert for use in an internal combustion engine, said valve seat insert made of an iron-based alloy comprising, in weight percent:
- carbon from about 1.6 to 3.0%;
- silicon from about 0.8 to 2.1%;
- manganese up to 1.0%;
- chromium from about 12.0 to 15.0%;
- molybdenum from about 2.0 to 4.0%;
- nickel from about 0.2 to 0.8%;
- copper from about 0.4 to 4.0%;
- phosphorus from about 0.005 to about 0.015%;
- boron from about 0.15 to 0.5%, and
- balance iron and incidental impurities;
- wherein the alloy has a microstructure comprising tempered martensite.
Dependencies are inferred from the claim text.