COLD-ROLLED STEEL SHEET WITH EXCELLENT PLASTIC ANISOTROPY AND STRENGTH AND METHOD OF MANUFACTURING THE SAME

The present invention provides a high-strength cold-rolled steel sheet having excellent plastic anisotropy, including 0.003 to 0.01 wt% of carbon (C), 0.05 to 0.3 wt% of silicon (Si), 1.0 to 2.0 wt% of manganese (Mn), 0.08 to 0.12 wt% of phosphorus (P), more than 0 and 0.01 wt% or less of sulfur (S)...

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Bibliographische Detailangaben
Hauptverfasser:	HAN CHEON HA, SHIN SANG HUN, WOO SEOK HO, LEE KANG ROH
Format:	Patent
Sprache:	eng ; kor
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 invention provides a high-strength cold-rolled steel sheet having excellent plastic anisotropy, including 0.003 to 0.01 wt% of carbon (C), 0.05 to 0.3 wt% of silicon (Si), 1.0 to 2.0 wt% of manganese (Mn), 0.08 to 0.12 wt% of phosphorus (P), more than 0 and 0.01 wt% or less of sulfur (S), 0.01 to 0.06 wt% of aluminum (Al), 0.003 to 0.02 wt% of niobium (Nb), 0.04 to 0.08 wt% of titanium (Ti), 0.0005 to 0.002 wt% of boron (B), and the remaining including iron (Fe) and other unavoidable impurities, wherein the plastic isotropy coefficient (r-value) is 1.4 to 3.0. 본 발명은 탄소(C): 0.003 ~ 0.01중량%, 규소(Si): 0.05 ~ 0.3중량%, 망간(Mn): 1.0 ~ 2.0중량%, 인(P): 0.08 ~ 0.12중량%, 황(S): 0 초과 0.01중량% 이하, 알루미늄(Al): 0.01 ~ 0.06중량%, 니오븀(Nb): 0.003 ~ 0.02중량%, 티타늄(Ti): 0.04 ~ 0.08중량%, 붕소(B): 0.0005 ~ 0.002중량% 및 나머지 철(Fe)과 기타 불가피한 불순물을 포함하며, 소성이방성계수(r-value)가 1.4 ~ 3.0인 것을 특징으로 하는, 소성이방성이 우수한 고강도 냉연 강판을 제공한다.