Method for controlling head-tail camber defect of hot-rolled thin steel strip

• Main Authors: JIA CHONGXUE, WANG SHUO, KANG YEFENG, LI HONGCUI, DING ZIZHENG, XU JUN, SHAN XIUYING, KANG HUAWEI, YIN CUILAN, YANG XIYA, GAO XINGCHANG, LIANG YA
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

The invention relates to the technical field of steel rolling, in particular to a hot-rolled thin steel strip head and tail camber defect control method which comprises the steps that the slab heating time is prolonged, the hot slab heating time is longer than or equal to 200 min, and the cold slab heating time is longer than or equal to 220 min; the rough rolling R2 adopts three-pass steel plates of the first pass, the third pass and the fifth pass to be centered; the rough rolling R2DT temperature is increased by 20-30 DEG C compared with a plate blank with the thickness of 2.5 mm or above and the same steel grade; the thickness of the R2 outlet plate blank is 30-35 mm; the deviation of the steel belt after rough rolling and the center line of the unit is controlled within +/-30mm; before finish rolling, a plate blank is put into a heat preservation cover, and an edge heater is adopted for temperature compensation. By optimizing the production processes such as plate blank heating, rough rolling and finish