High-strength ultralow-temperature low-carbon bainite Q550MF steel plate and production method thereof

The invention discloses a 50-80 mm high-strength ultralow-temperature low-carbon bainite Q550MF steel plate and a production method thereof. The steel plate contains the following chemical components:C, Si, Mn, P, S, Nb, V, Cr, Mo, Ni, 0.018-0.03% of Als, 0.38-0.47% of CEV, and the balance Fe and re...

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Hauptverfasser:	LI ZHONGBO, YANG CHUN, ZHU SHUCHENG, REN YI, BAI YIBO, YU SA, PANG BAIMING, KANG WENJU, XU SHAOPU, CHEN LIANG, YUAN SHUXIN, QUAN WEIBO, WANG YINGJIE, ZHANG TAO, WANG XIBIN, YUAN JIHENG, JIANG PENG, LIU QINGBO, ZHANG ZHANJIE, LYU YULIANG, ZHANG GUODONG, ZHU XIANXING, ZHENG HAIMING, YUAN GAOJIAN, XUE YANSHENG, YANG YANG, YUAN YONGQI, TANG ZHENGLEI, FU KEYI, LI LIANG
Format:	Patent
Sprache:	chi ; 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 PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention discloses a 50-80 mm high-strength ultralow-temperature low-carbon bainite Q550MF steel plate and a production method thereof. The steel plate contains the following chemical components:C, Si, Mn, P, S, Nb, V, Cr, Mo, Ni, 0.018-0.03% of Als, 0.38-0.47% of CEV, and the balance Fe and residual elements. The production method of the steel plate comprises the following steps of molten iron, a converter, an argon station, VD decarbonization, LF refining, VD vacuum treatment, continuous casting, casting blank cutting and stack cooling for 24 h, casting blank heating, rolling and stackcooling. According to the obtained steel plate, the yield strength is controlled within 570-609 MPa, and the tensile strength is controlled within 686-712 MPa; and according to the performance requirements of the GB/T 1591-2018 standard, the strength of the steel plate meets the standard for Q550ME with the thickness of 50-80 mm, and the performance of the steel plate completely meets the requirement of the Q550MF grade.