METHOD OF PRODUCING AUSTENTIC IRON/CARBON/MANGANESE STEEL SHEETS HAVING VERY HIGH STRENGTH AND ELONGATION CHARACTERISTICS AND EXCELLENT HOMOGENEITY

METHOD OF PRODUCING AUSTENTIC IRON/CARBON/MANGANESE STEEL SHEETS HAVING VERY HIGH STRENGTH AND ELONGATION CHARACTERISTICS AND EXCELLENT HOMOGENEITY

A hot-rolled austenitic iron/carbon/manganese steel sheet, the strength of which is greater than 1200 MPa, the product P (strength (in MPa)×elongation at break (in %)) of which is greater than 65 000 MPa % and the nominal chemical composition of which comprises, the contents being expressed by weigh...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: THEYSSIER, MARIERISTINE, STOUVENOT, FRANÇOIS, GUELTON, NICOLAS, CUGY, PHILIPPE, SCOTT, COLIN
Format: Patent
Sprache:eng ; pol
Schlagworte:
ALLOYS
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:A hot-rolled austenitic iron/carbon/manganese steel sheet, the strength of which is greater than 1200 MPa, the product P (strength (in MPa)×elongation at break (in %)) of which is greater than 65 000 MPa % and the nominal chemical composition of which comprises, the contents being expressed by weight: 0.85% C 1.05%; 16% Mn 19%; Si 2%; Al 0.050%; S 0.030%; P 0.050%; N 0.1%, and, optionally, one or more elements chosen from: Cr 1%; Mo 0.40%; Ni 1%; Cu 5%; Ti 0.50%; Nb 0.50%; V 0.50%, the rest of the composition consisting of iron and inevitable impurities resulting from the smelting, the recrystallized surface fraction of said steel being equal to 100%, the surface fraction of precipitated carbides of said steel being equal to 0% and the mean grain size of said steel being less than or equal to 10 microns.