Thin-gauge high-toughness steel plate and manufacturing process thereof

• Main Authors: WANG RUNGANG, HU SHU'E, HU XIAOYING, WANG JIAN, SHI CHENGBIN, LI CANMING, YANG JIANXUN, CHENG XIAOLONG, SUN JINGBO, HOU DONGHUA, LIU XIZHANG, HAO YANSEN
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2022
• Subjects: ALLOYS; CHEMISTRY; COMBINED OPERATIONS; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; OTHER WORKING OF METAL; PERFORMING OPERATIONS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIVERSAL MACHINE TOOLS

The invention relates to the technical field of metallurgy, in particular to a thin-gauge high-toughness steel plate and a manufacturing process thereof. The thin-gauge high-toughness steel plate is manufactured according to the following manufacturing process: (1) preparing blanks; (2) milling and cleaning the surfaces of the blanks; (3) spraying an isolating agent on to-be-assembled surfaces of the blanks and drying the to-be-assembled surfaces of the blanks; (4) making the blanks aligned and assembled, and carrying out peripheral girth welding on interface gaps of the adjacent blanks to obtain a composite blank; (5) heating the composite blank, discharging and rolling the composite blank after diathermy, controlling the thickness of an intermediate blank according to 30-50mm, and flattening and air-cooling after rolling to obtain a composite steel plate; and (6) shearing the head, tail and two sides of the composite steel plate and separating the steel plate. The alloy adding cost and the heat treatment co