STEEL SHEET FOR MANUFACTURING PRESS HARDENED PARTS, METHOD FOR PRODUCING THE STEEL SHEET, PRESS HARDENED PART HAVING A COMBINATION OF HIGH STRENGTH AND CRASH DUCTILITY, PROCESS FOR MANUFACTURING A PRESS HARDENED PART, WELDED ASSEMBLY, USE OF THE PRESS HARDENING PART

A steel sheet for the manufacture of a press hardened part, having a composition comprising: 0.15% ≤ C ≤ 0.22%, 3.5% ≤ Mn < 4.2%, 0.001% ≤ Si ≤ 1.5%, 0.020% ≤ Al ≤ 0.9%, 0.001% ≤ Cr ≤ 1%, 0.001% ≤ Mo ≤ 0.3%, 0.001% ≤ Ti ≤ 0.040%, 0.0003% ≤ B ≤ 0.004%, 0.001% ≤ Nb ≤ 0.060%, 0.001% ≤ N ≤ 0.009%, 0....

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Bibliographische Detailangaben
Hauptverfasser:	GIBOT, Alexandre, DUMONT, Alice, PERLADE, Astrid, BEAUVAIS, Martin, ZHU, Kangying
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	A steel sheet for the manufacture of a press hardened part, having a composition comprising: 0.15% ≤ C ≤ 0.22%, 3.5% ≤ Mn < 4.2%, 0.001% ≤ Si ≤ 1.5%, 0.020% ≤ Al ≤ 0.9%, 0.001% ≤ Cr ≤ 1%, 0.001% ≤ Mo ≤ 0.3%, 0.001% ≤ Ti ≤ 0.040%, 0.0003% ≤ B ≤ 0.004%, 0.001% ≤ Nb ≤ 0.060%, 0.001% ≤ N ≤ 0.009%, 0.0005% ≤ S ≤ 0.003%, 0.001 % ≤ P ≤ 0.020%, the microstructure consisting of less than 50% ferrite, 1% to 20% retained austenite, cementite, such that the surface density of cementite particles larger than 60 nm is lower than 10^7/mm2, the complement consisting of bainite and/or martensite, the retained austenite having an average Mn content of at least 1.1*Mn%. Press-hardened steel part obtained by hot forming the steel sheet, and manufacturing methods thereof.