Iron-based alloy for internal combustion engine valve seat inserts
AssigneeL. E. Jones Company
InventorCong Yue Qiao
Life of this patent
Estimating the term…
Abstract
An iron-based corrosion resistant and wear resistant alloy is addressed. The alloy contains (in weight percent) 1.1-1.4% carbon, 11-14.25% chromium, 4.75-6.25% molybdenum, 3.5-4.5% tungsten, 0-3% cobalt, 1.5-2.5% niobium, 1-1.75% vanadium, 0-2.5% copper, up to 1.0% silicon, up to 0.8% nickel, up to 0.6% manganese, and the balance iron. The alloy is suitable for use in valve seat insert applications.
Claims21
An iron-based alloy comprising, in weight percentage:
- carbon from about 1.1 to about 1.4;
- chromium from about 11 to about 14.25;
- molybdenum from about 4.75 to about 6.25;
- tungsten from about 3.5 to about 4.5;
- cobalt from 0 to about 3;
- niobium from about 1.5 to about 2.5;
- vanadium from about 1 to about 1.75;
- copper from 0 to about 2.5;
- silicon up to about 1;
- nickel up to about 0.8;
- manganese up to about 0.6;
- and
- iron from about 61 to about 77.15.
The alloy of claim I wherein the alloy comprises from about 1.5 to about 2.5 weight percent cobalt.
A valve seat insert for use in an internal combustion engine, said valve seat insert made of an alloy comprising, in weight percentage:
- carbon from about 1.1 to about 1.4;
- chromium from about 11 to about 14.25;
- molybdenum from about 4.75 to about 6.25;
- tungsten from about 3.5 to about 4.5;
- cobalt from 0 to about 3;
- niobium from about 1.5 to about 2.5;
- vanadium from about 1 to about 1.75;
- copper from 0 to about 2.5;
- silicon up to about 1;
- nickel up to about 0.8;
- manganese up to about 0.6;
- and
- iron from about 61 to about 77.15.
A cast, iron-based alloy comprising, in weight percentage:
- carbon from about 1.1 to about 1.4;
- chromium from about 11 to about 14.25;
- molybdenum from about 4.75 to about 6.25;
- nickel up to about 0.8;
- tungsten from about 3.5 to about 4.5;
- and
- the balance, iron, other alloying elements and incidental impurities.
An iron-based alloy comprising:
- TABLE 1 Element Weight Percent Carbon 1.15-1.35 Chromium 12.75-14.15 Molybdenum 5.25-6.15 Tungsten 3.75-4.55 Cobalt 1.95-2.45 Niobium 1.75-2.55 Vanadium 1.15-1.75 Copper 0-2 Silicon up to 1 Nickel up to 0.8 Manganese up to 0.6 Boron 0-1 Iron balance.
Dependencies are inferred from the claim text.