Production method of high manganese steel thin and wide plate for low-temperature tank

• Main Authors: WU ZHONGWEN, ZHANG QINGXUE, LENG PENG, LIU XIANWEI, YU QING, LUO DENG, XIAO DAHENG, DENG BIAO, WANG HONGTAO, SHANG PING, GAO QING
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• Subjects: 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

The invention discloses a production method of a high manganese steel thin and wide plate for a low-temperature tank, the production process comprises the steps of molten iron pretreatment, converter treatment, LF and RH/VD refining, continuous casting, heating, rolling and MULPIC cooling, and the production method is characterized in that the steel comprises the following chemical components in percentage by weight: 0.37-0.39% of C, 23.0-24.0% of Mn, 0.2-0.4% of Si, 0.30-0.40% of Cu, 3.1-3.5% of Cr, 0.01-0.20% of Ni, less than or equal to 0.07% of Al, less than or equal to 0.01% of P, less than or equal to 0.005% of S and the balance of Fe and inevitable impurity elements. A high-temperature long-time heating mode is adopted, and it is guaranteed that the temperature inside and outside the plate blank is uniform; a two-stage rolling mode is adopted, the rolling starting and finishing temperature and the single-pass reduction rate are controlled, and it is guaranteed that the internal structure of the steel p