HOT ROLLED STEEL PLATE HAVING LOW YIELD RATIO AND HIGH STRENGTH AND PRODUCTION THEREOF

PURPOSE:To provide a low yield ratio and high strength hot rolled steel sheet having respective characteristics of conventional precipitation strengthened steel and structure strengthened steel, overcoming the defects of these steels, excellent in tensile strength, reduced in yield ratio, showing su...

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Bibliographische Detailangaben
Hauptverfasser:	MORITA MASAHIKO, MASUI SUSUMU, KATO TOSHIYUKI
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:	PURPOSE:To provide a low yield ratio and high strength hot rolled steel sheet having respective characteristics of conventional precipitation strengthened steel and structure strengthened steel, overcoming the defects of these steels, excellent in tensile strength, reduced in yield ratio, showing superior balance between strength and ductility, and excellent in fatigue characteristics and spot weldability as well as in stretch-flange formability represented by side bend elongation and bore-expand ratio. CONSTITUTION:This steel plate has a composition consisting of 0.05-0.18% C, 0.5-2.5% Si, 0.5-2.5% Mn,