Alloy overlay having thermal characteristics similar to those of a substrate
AssigneeInco Alloys International, Inc.
InventorsSamuel D. Kiser, Melissa A. Moore, David B. O'Donnell
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Abstract
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.
Claims4
A binary structure comprising a mild or low alloy steel substrate and a nickel-base alloy disposed thereon, the alloy having a coefficient of thermal expansion of about 7.2.times.10.sup.-6 in/in/.degree. F. at 800.degree. F. and a thermal conductivity of about 100-130 BTU-in/ft.sup.2 hr-.degree. F. at 800.degree. F. which is physically and thermally compatible with the steel substrate and including 19-20% molybdenum, 5-6% chromium, up to about 2% iron, the iron/chromium ratio less than about 0.6, up to about 3% tungsten and/or niobium, up to about 0.1% carbon, commercially acceptable levels of impurities, and the balance nickel.
Dependencies are inferred from the claim text.