Iron-chromium aluminium alloy

C - Chemistry – Metallurgy – 22 – C

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C22C 38/18 (2006.01)

Patent

CA 2564651

The invention relates to an iron-chrome-aluminum alloy with a high service life, comprising (in mass %) 4 to 8 % Al and 16 to 24 % Cr and other added materials, 0.05 to 1 % Si, 0.001 to 0.5 % Mn, 0.02 to 0.2 % Y, 0.1 to 0.3 % Zr and/or 0.02 to 0.2 % Hf, 0.003 to 0.05 % C, 0.0002 to 0.05 % Mg, 0.0002 to 0.05 % Ca, max. 0.04 % N, max. 0.04 % P, max. 0.01 % S, max. 0.5 % Cu and the usual melting-related impurities, the remainder being iron.

La présente invention concerne un alliage fer-chrome-aluminium de longévité élevée, comprenant (en % en masse) de 4 à 8 % de Al, de 16 à 24 % de CR, et des additifs en des quantités correspondant à 0,05 à 1 % de Si, 0,001 à 0,5 % de Mn, 0,02 à 0,2 % de Y, 0,1 à 0,3 % de Zr et/ou 0,02 à 0,2 % de Hf, 0,003 à 0,05 % de C, 0,0002 à 0,05 % de Mg, 0,0002 à 0,05 % de Ca, max. 0,04 % de N, max. 0,04 % de P, max. 0,01 % de S, max. 0,5 % de Cu, ainsi que les impuretés liées à la fusion, le reste de l'alliage étant du fer.

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