Ultrahigh strength hot-rolled steel and method of producing...

Details Ultrahigh strength hot-rolled steel and method of producing... Ultrahigh strength hot-rolled steel and method of producing...

C - Chemistry, Metallurgy

21

D

C21D 8/02 (2006.01) C22C 38/04 (2006.01) C22C 38/28 (2006.01)

Patent

CA 2513096

The invention relates to ultrahigh strength hot-rolled steel having a chemical composition consisting of, by weight: 0.05 % = C = 0.1 %, 0.7 % = Mn = 1.1 %, 0.5 % = Cr = 1 %, 0.05 % = Si = 0.3 %, 0.05 = Ti = 0.1 %, Al = 0.07, S = 0.03 %, P = 0.05, the remainder comprising iron and impurities resulting from the production thereof. Moreover, the inventive steel has a bainitic-martensitic structure which can contain up to 5 % ferrite. The invention also relates to a method of producing bands of said steel.

L'invention concerne un acier laminé à chaud à très haute résistance, dont la composition chimique comprend, en poids 0,05% <= C <= 0,1 0,7% <= Mn <= 1, 1% 0,5% <= Cr <= 1, 0% 0,05% <= Si<= 0,3% 0, 05 <=Ti < 0,1 AI <= 0,07 S <= 0,03% P <= 0,05% le reste étant du fer et des impuretés résultant de l'élaboration, ledit acier ayant une structure bainito-martensitique pouvant contenir jusqu'à 5% de ferrite, ainsi qu'un procédé de fabrication de bandes de cet acier.

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