Preparation method of F-grade super-thick steel plate

The invention particularly relates to a preparation method of an F-grade super-thick steel plate, and belongs to the field of steel preparation. The preparation method of the F-grade super-thick steel plate comprises the following steps: controlling P and S to be preset contents in a smelting stage...

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Hauptverfasser:	ZHOU DEGUANG, ZHANG XUEFENG, WANG DONGZHU, HAN CHENGLIANG, YOU LIJIE, LIU YANG, LIU JINGANG, SHEN KAIZHAO, WANG GENJI, MA GUOJIN, ZOU YANG, WANG KAIKAI, KANG YONGLIN, LU SHIPING, XU HAIWEI, XIE CUIHONG, WANG XIAOYONG, DI GUOBIAO, HUANG LEQING, WEI YUNFEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention particularly relates to a preparation method of an F-grade super-thick steel plate, and belongs to the field of steel preparation. The preparation method of the F-grade super-thick steel plate comprises the following steps: controlling P and S to be preset contents in a smelting stage to obtain molten steel; carrying out vacuum degassing on the molten steel to obtain degassed molten steel; the degassed molten steel is subjected to continuous casting, dynamic soft reduction and solidification tail end heavy reduction are adopted, and a steel billet is obtained; and the steel billet is subjected to stack cooling, heating, rolling, slow cooling and normalizing, and the F-grade super-thick steel plate is obtained. By controlling P and S to be preset contents, center segregation is effectively controlled; the hydrogen content in the steel is effectively controlled through vacuum degassing treatment; through the operation of dynamic soft reduction and solidification tail end heavy reduction, the inter