TWIP STEEL SHEET HAVING AN AUSTENITIC MATRIX

Abstract: a cold rolled and recovered twip steel sheet is provided having an austenitic matrix including by weight: 0.71<c<1.2%, 13.0≤mn<25.0%, s≤0.030%, p≤0.080%, n≤0.1%, 0.1≤si≤3.0%, 0.1≤v≤2.50%, and on a purely optional basis, one or more elements such as cu≤5.0%, al≤4.0%, nb≤0.5%, b≤0.005%, cr≤1.0%, mo≤0.40%, ni≤1.0%, ti≤0.5%, 0.06≤sn≤0.2%, the remainder of the composition being made of iron and inevitable impurities resulting from elaboration.

Inventor(s): Colin SCOTT, Thierry IUNG, Marie-Christine THEYSSIER

CPC Classification: C21D9/46 (MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class and at least one process covered by this subclass ; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials ))

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