A HOT-ROLLED STEEL STRIP PRODUCT AND METHOD FOR ITS PRODUCTION

• Main Authors: NYMANN, Erik, GLADH, Magnus, NILSSON, Robin, LIND, Martin
• Format: Patent
• Language: English; French; German
• Published: 17.05.2023
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A hot-rolled steel strip product having a tensile strength (Rm) above 1400 MPa and a microstructure comprising at least 90 % by volume of martensite. The steel has a composition comprising, in percent by weight (wt.-%):C 0.20 - 0.26Si 0.05 - 0.5,Mn 0.2 - 0.8,Cr 0.2 - 0.6,Ni 0.2 - 0.5,Al 0.015 - 0.065,Ti 0.005 - 0.02,B 0.001 - 0.005,optionally Cu <0.30,optionally Mo <0.10,optionally Nb <0.01,optionally V <0.04,balance Fe and unavoidable impurities.