A ferritic steel and a process for its production and use

Details A ferritic steel and a process for its production and use A ferritic steel and a process for its production and use

C - Chemistry, Metallurgy

22

C

C22C 38/06 (2006.01) C21D 8/02 (2006.01) C22C 38/04 (2006.01)

Patent

CA 2224817

The invention concerns a dual-phase steel having a predominantly polygonal- ferritic structure which includes a carbon-enriched perlite-free hard second phase comprising martensite and/or bainite and/or residual austenite. This steel has high strength, good workability and improved surface quality after hot-working. The invention also concerns a method for producing this steel and its use.

L'invention concerne un acier à phase double à structure polygonale-ferritique prépondérante, comprenant une seconde phase dure incorporée, exempte de perlite et enrichie en carbone, consistant en martensite et/ou en bainite et/ou en austénite résiduelle. Cet acier est très résistant et présente une bonne aptitude à la déformation, ainsi qu'une meilleure qualité de surface après déformation à chaud. L'invention concerne en outre un procédé permettant de le produire et son utilisation.

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