C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 30/00 (2006.01) C22C 19/05 (2006.01) C22C 32/00 (2006.01) C22C 33/02 (2006.01) C22C 38/40 (2006.01)
Patent
CA 2504937
An improved nickel-chromium-iron alloy is provided, which comprises up to about 5 % of hafnium-containing particles. In one embodiment, an improved creep resistant castable oxide dispersion strengthened nickel-chromium-iron alloy comprises up to about 5 % of hafnium, with at least part of the hafnium being present as finely dispersed oxidised particles. Further embodiments of the improved alloy can comprise additionally up to about 15 % by weight aluminium. The alloy is particularly useful in the production of creep resistant tubes and castings, for example, for the petrochemical market.
L'invention concerne un alliage nickel-chrome-fer amélioré qui comprend jusqu'à environ 5 % de particules contenant de l'hafnium. Dans l'un des modes de réalisation, un alliage nickel-chrome-fer amélioré à durcissement par phase dispersée à oxyde coulable résistant au fluage comprend jusqu'à environ 5 % d'hafnium, avec au moins une partie de l'hafnium présente sous forme de particules oxydées finement dispersées. Dans d'autres modes de réalisation de l'invention, l'alliage amélioré peut, en outre, comprendre jusqu'à environ 15 % en poids d'aluminium. L'alliage est particulièrement utile dans la production de tubes et de pièces moulées résistants au fluage, par exemple, pour le marché pétrochimique.
Flahaut Dominique
Ridout & Maybee Llp
Schmidt & Clemens Gmbh & Co. Kg
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