Cold rolled and coated steel sheet and a method of manufacturing thereof

A cold rolled and heat treated steel sheet having a composition including elements, expressed in percentage by weight 0.11%≤Carbon≤0.15%, 1.1%≤Manganese≤1.8%, 0.5%≤Silicon≤0.9%, 0.002%≤Phosphorus≤0.02%, 0%≤Sulfur≤0.003%, 0%≤Aluminum≤0.05%, 0%≤Nitrogen≤0.007%, and can contain one or more of optional...

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Bibliographische Detailangaben
1. Verfasser:	Alibeigi, Samaneh
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:	A cold rolled and heat treated steel sheet having a composition including elements, expressed in percentage by weight 0.11%≤Carbon≤0.15%, 1.1%≤Manganese≤1.8%, 0.5%≤Silicon≤0.9%, 0.002%≤Phosphorus≤0.02%, 0%≤Sulfur≤0.003%, 0%≤Aluminum≤0.05%, 0%≤Nitrogen≤0.007%, and can contain one or more of optional elements 0.05%≤Chromium≤1%, 0.001%≤Molybdenum≤0.5%, 0.001%≤Niobium≤0.1%, 0.001%≤Titanium≤0.1%, 0.01%≤Copper≤2%, 0.01%≤Nickel≤3%, 0.0001%≤Calcium≤0.005%, 0%≤Vanadium≤0.1%, 0%≤Boron≤0.003%, 0%≤Cerium≤0.1%, 0%≤Magnesium≤0.010%, 0%≤Zirconium≤0.010% the remainder being composed of iron and unavoidable impurities, the microstructure of said steel sheet comprising, 50 to 80% Ferrite, 10 to 30% Bainite, 1 to 10% Residual Austenite, and 1% to 5% Martensite, wherein the cumulated amounts of Bainite and Residual Austenite is more than or equal to 25%.