Ferritic stainless steel with excellent brazeability

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

C22C 38/00 (2006.01) C22C 38/58 (2006.01)

Patent

CA 2707518

This ferritic stainless steel with excellent brazeability includes, in terms of mass percent, 0.03% or less of C, 0.05% or less of N, 0.015% or more of C+N, 0.02 to 1.5% of Si, 0.02 to 2% of Mn, 10 to 22% of Cr, 0.03 to 1% of Nb, and 0.5% or less of A1, and further includes Ti in a content that satisfies the following formulae (1) and (2), with the remainder composed of Fe and unavoidable impurities. Ti-3N<=0.03 ...(1) 10(Ti-3N)+A1<=0.5 . . . (2) (Here, the atomic symbols in formulae (1) and (2) indicate the content (mass %) of the respective element, and the numerical values that precede the atomic symbols are constants.)

La présente invention concerne un acier inoxydable ferrique présentant une excellente aptitude au brasage, qui comprend 0,03 % en masse ou moins de C, 0,05 % en masse ou moins de N, C et N dans la quantité totale de 0,015 % en masse ou plus, 0,02 à 1,5 % en masse de Si, 0,02 à 2 % en masse de Mn, 10 à 22 % en masse de Cr, 0,03 à 1 % en masse de Nb et 0,5 % en masse ou moins d'Al, et qui contient en outre Ti en une quantité telle que les exigences représentées par les formules (1) et (2) peuvent être satisfaites, le reste étant Fe et des impuretés inévitables. Ti-3N = 0,03 (1) 10(Ti-3N) + Al = 0,5 (2) où les symboles atomiques représentent le contenu des éléments (exprimé en % en masse) ; et les valeurs numériques montrées devant les symboles atomiques représentent indépendamment un nombre constant.

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