A high-strain steel plate for high-homogeneity l485 marine line pipe and its manufacturing method
A high-strain, steel plate technology, applied in the field of metal materials, can solve the problems of high equipment capacity requirements, large differences in the thickness direction of tissue steel plates, and inability to directly assemble production, etc., to achieve excellent high-strain performance, reduce production costs, and steel plate structure and performance Uniform and stable effect
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[0037] Below by embodiment the present invention will be further described.
[0038] In the embodiment of the present invention, according to the component ratio of the technical solution, molten steel smelting→external refining→casting→slab reheating→controlled rolling→controlled cooling→heat treatment→air cooling to room temperature.
[0039] (1) Slab reheating: the thickness of the continuous casting slab is 250-300mm, the continuous casting slab is directly loaded and heated, the furnace loading temperature is not lower than 300°C, and the furnace temperature is controlled at 1160-1210°C;
[0040] (2) Controlled rolling: the temperature range for the start of rough rolling is 1050-1150°C, and the temperature range for the finish of rough rolling is 950-970°C; the cumulative deformation rate in the rough rolling stage ranges from 55% to 65%; The range is 850-900°C, and the finishing rolling temperature range is 800-850°C; the cumulative deformation rate in the finishing rol...
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