Alloys for high temperature service in aggressive environments

Details Alloys for high temperature service in aggressive environments Alloys for high temperature service in aggressive environments

C - Chemistry, Metallurgy

22

C

C22C 19/05 (2006.01)

Patent

CA 2352823

An alloy resistant to carburization and high temperature oxidation resistance. The alloy consists essentially of, by weight percent, 27 to 35 chromium, 0 to 7 iron, about 3 to 4.4 aluminum, 0 to 0.4 titanium, 0.2 to 3 niobium, 0.12 to 0.5 carbon, 0 to 0.05 zirconium, 0.002 to 0.05 total cerium and yttrium, 0 to 1 manganese, 0 to 1 silicon, 0 to 0.5 calcium plus magnesium, 0 to 0.1 boron and balance nickel plus incidental impurities.

Cette invention se rapporte à un alliage qui résiste à la cémentation par le carbone et à l'oxydation à hautes températures et qui contient, en pourcentage en poids, 27 à 35 % de chrome, 0 à 7 % de fer, environ 3 à 4,4 % d'aluminium, 0 à 0,4 % de titane, 0,2 à 3 % de niobium, 0,12 à 0,5 % de carbone, 0 à 0,05 % de zirconium, 0,002 à 0,05 % de cérium et d'yttrium au total, 0 à 1 % de manganèse, 0 à 1 % de silicium, 0 à 0,5 % de calcium plus magnésium, 0 à 0,1 % de bore, le reste étant constitué par du nickel plus les impuretés accidentelles.

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