Production method of super-thick steel plate

The invention provides an extra-thick steel plate production method, and relates to the technical field of steel plate processes. The production method of the super-thick steel plate comprises the steps of molten iron desulphurization, converter smelting, LF furnace refining, VD vacuum refining, con...

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Bibliographische Detailangaben
Hauptverfasser:	JIA GUAN, ZHANG XUEFENG, HE YUANCHUN, WANG DONGZHU, HAN CHENGLIANG, LIU YANG, LIU JINGANG, SHEN KAIZHAO, ZOU YANG, MA GUOJIN, 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 PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention provides an extra-thick steel plate production method, and relates to the technical field of steel plate processes. The production method of the super-thick steel plate comprises the steps of molten iron desulphurization, converter smelting, LF furnace refining, VD vacuum refining, continuous casting soft reduction, continuous casting heavy reduction, billet pile cooling, billet heating, rough rolling, finish rolling, water cooling, hot straightening, steel plate slow cooling, fire cutting, mechanical property inspection and flaw detection. According to the method, in the converter smelting step, the components of a casting blank are controlled; vD vacuum refining, wherein the hydrogen content is controlled to be 1.2 ppm or below; rough rolling is conducted, specifically, the initial rolling temperature is set to be 1170 DEG C +/-20 DEG C, the temperature control thickness of a finished product is + 15 mm, the rolling reduction of the last three passes of rough rolling ranges from 40 mm to 45 mm