A method for producing spheroidized or non-lamellar microstructure steels

The present disclosure discloses a method for producing high strength hot rolled steel. The method includes casting a steel slab of a composition, comprising in weight%: carbon (C) of about 0.45 wt.% - 1.2 wt.%, manganese (Mn) of about 0.0 -1.0 wt.%, silicon (Si) of about 0.0-0.5 wt.%, niobium (Nb)...

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Bibliographische Detailangaben
Hauptverfasser:	RAJU, Pankaj, MAHASHABDE, Vinay V, CHANDRA, Sanjay, CHINTHA, Appa Rao, P. KALINGANAVAR, Basavaraj, SHAH, V. K, SAINI, Avtar Singh, DUTTA, Monojit, RAJU, M. B. N
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS 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 TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present disclosure discloses a method for producing high strength hot rolled steel. The method includes casting a steel slab of a composition, comprising in weight%: carbon (C) of about 0.45 wt.% - 1.2 wt.%, manganese (Mn) of about 0.0 -1.0 wt.%, silicon (Si) of about 0.0-0.5 wt.%, niobium (Nb) up-to 0.03 wt.%, sulphur (S) up-to 0.05 wt.% of S, phosphorous (P) up-to 0.05 wt.%, nitrogen (N) 0.002 wt.% - 0.012 wt.% and balance being Iron (Fe) optionally along with incidental elements. The method also involves, heating, hot rolling, cooling, coiling the steel and retaining the steel at an ambient temperature to produce high strength hot rolled steel with 75 - 95% spheroid microstructure and 5 - 25% pearlite microstructure.