Inco Alloys International, Inc.

Goro Nickel S.a.

Melissa A Moore

John S Smith

Darrell F Smith, Jr

Larry I Stein

Karl A Heck

Samuel D Kiser

David B O'Donnell

Ladonna Sheree Hillis

The alloy of the invention provides a low coefficient of thermal expansion alloy having a CTE of about 4.9.times.10.sup.-6 m/m/.degree.C. or less at 204.degree. C. and a relatively high strength. The alloy contains about 40.5 to about 48 nickel, about 2 to about 3.7 niobium, about 0.75 to about 2 titanium, about 0 to about 1 aluminum, about 3.7 or less total niobium plus tantalum and a balance of iron and incidental impurities. Alloys of the invention may be aged to a Rockwell C hardness of at least about 30.

High strength low thermal expansion alloy

The invention provides a controlled coefficient of thermal expansion alloy having in weight percent about 26-50% cobalt, about 20-40% nickel, about 20-35% iron, about 4-10% aluminum, about 0.5-5% niobium plus 1/2 of tantalum weight percent and about 1.5-10% chromium. Additionally the alloy may contain about 0-1% titanium, about 0-0.2% carbon, about 0-1% copper, about 0-2% manganese, about 0-2% silicon, about 0-8% molybdenum, about 0-8% tungsten, about 0-0.3% boron, about 0-2% rhenium, about 0-2% hafnium, about 0-0.3% zirconium, about 0-0.5% nitrogen, about 0-1% yttrium, about 0-1% lanthanum, about 0-1% total rare earths other than lanthanum, about 0-1% cerium, about 0-1% magnesium, about 0-1% calcium, about 0-4% oxidic dispersoid and incidental impurities. The alloy may be further optimized with respect to crack growth resistance by annealing at temperature below about 1010.degree. C. or temperatures between 1066.degree. C. or 1110.degree. C. and the melting temperature and by aging at a beta precipitation temperature greater than about 788.degree. C.

Controlled thermal expansion superalloy

A nickel-base alloy suitable for overlaying steel substrates. The alloy and steel have similar thermal conductivities and thermal coefficients of expansion. The alloy broadly initially contains about 15-20% molybdenum, about 5-10% chromium, up to about 2% iron, up to about 5% tungsten and/or niobium, up to about 0.1% carbon, and the balance essentially nickel.

Alloy overlay having thermal characteristics similar to those of a

Growing community of inventors

South Point, OH, United States of America

Melissa A Moore