Cr-based alloy having an excellent strength-ductility...

Details Cr-based alloy having an excellent strength-ductility... Cr-based alloy having an excellent strength-ductility...

C - Chemistry, Metallurgy

22

C

C22C 27/06 (2006.01)

Patent

CA 2375354

A strength-ductility balance at a high temperature above 1000°C, particularly a high temperature above 1050°C is improved by rendering a chemical composition of Cr-based alloy into Cr: not less than 60 mass%, C+N: not more than 20 mass ppm, S: not more than 20 mass ppm, O: not more than 100 mass ppm, O as an oxide: not more than 50 mass ppm, and the remainder being Fe and inevitable impurities.

L'invention se rapporte à un alliage à base de chrome possédant la composition suivante: au moins 60 % en masse de Cr, pas plus de 20 ppm en masse de C + N, pas plus de 20 ppm en masse de S, pas plus de 100 ppm en masse de O, à condition que le contenu en oxygène sous forme d'oxydes soit inférieur ou égal à 50 ppm en masse, le reste de la composition étant composée de Fe et d'impuretés inévitables. Cet alliage à base de chrome présente un équilibre amélioré de ses caractéristiques de résistance et de ductilité à haute température, et notamment à une température supérieure ou égale à 1000 DEG C, et en particulier à une température supérieure ou égale à 1050 DEG C.

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