Production method of Cr-Mo steel plate

• Main Authors: LI JIE, GU ZIYOU, WU YANYANG, WANG DONGYANG, ZHAO ZIJUAN, LI YANGBING, YUE XINXIN, WEI MING, YIN WEIJIANG, ZHAO GUOCHANG, LONG JIE, NIU HONGXING, YUAN JINCHENG, LI JIANCHAO, PANG HUIYONG, HOU JINGCHAO
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2021
• Subjects: CHEMISTRY; 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

The invention discloses a production method of a Cr-Mo steel plate. The production method comprises the procedures of smelting, continuous casting, plate blank heating, rolling, cooling and heat treatment. In the rolling procedure, hot rolling is adopted for direct forming, and the finish rolling temperature is controlled to be 910-930 DEG C. In the cooling procedure, ACC cooling equipment is adopted for cooling, the steel plate is cooled in water 10-20 seconds after rolling, and cooling is conducted to 300-350 DEG C within 2-3 minutes. The tensile strength of the finished steel plate in the normalizing and tempering state is 600-650 MPa, the tensile strength of the finished steel plate in the normalizing, tempering and minimum die welding state is 560-610 MPa, the tensile strength of the finished steel plate in the normalizing, tempering and maximum die welding state is 540-570 MPa, the impact at -29 DEG C is larger than or equal to 80 J, and the grain size is 7-9 grades. 本发明一种Cr-Mo钢钢板的生产方法，包括冶炼、连铸、板坯加热、轧制、冷