High-temperature austenitic alloys and articles utilizing...

Details High-temperature austenitic alloys and articles utilizing... High-temperature austenitic alloys and articles utilizing...

C - Chemistry, Metallurgy

22

C

75/106

C22C 38/40 (2006.01) C22C 38/52 (2006.01) C23C 30/00 (2006.01)

Patent

CA 1082949

Abstract of the Disclosure This invention relates to austenitic alloys of iron, chromium, aluminum, and yttrium used as cladding suitable for high temperature applications in corrosive gas turbine atmospheres. These alloys are normally ferritic in nature, but they are rendered sustenitic in accord with this invention. This is accomplished by adding to the alloys selected quantities of nickel or nickel and cobalt, at least 30% by weight. The addition of these elements yields a 66% or greater face centred cubic crystal structure having high temperature properties which are superior to the base alloys without diminishing the excellent high-temperature oxidation and hot corrosion resistance of the base alloys.

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