Manufacturing process of high-quality wide and thick plate blank
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A manufacturing process and high-quality technology, applied in the field of wide and thick slabs for wide and thick plate rolling mills, can solve problems such as low efficiency and high manufacturing costs, and achieve the effects of avoiding surface cracks, improving surface strength, and improving density
Active Publication Date: 2011-08-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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[0005] The purpose of the present invention is to provide a high-quality wide-thick slab manufact
Method used
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Embodiment 1
[0029] Slab material: Q345E;
[0030] Slab thickness: 500mm;
[0031] Total weight of molten steel: 30 tons;
[0032] Pouring time: 15min;
[0033] Hydraulic cylinder pressurization time: 20 minutes after pouring, gradually increase the hydraulic cylinder pressure.
[0034] Maximum pressure on one side of wide and thick slabs: 4 hydraulic cylinders are arranged on each water-cooled movable mold, the maximum pressure exerted by a single hydraulic cylinder is 30 tons, and the maximum pressure on one side of wide and thick slabs is 120 tons.
[0036] Pressure holding time of the hydraulic cylinder: 40 minutes. After the pressure holding is completed, the hydraulic cylinder applies reverse pressure to separate the water-cooled movable mold from the wide and thick slab.
[0037] The gap between the wide and thick slab and the water-cooled movable mold: 10mm.
[0038] Through the implementation of the above process, the i...
Embodiment 2
[0040] Slab material: EH36;
[0041] Slab thickness: 1000mm;
[0042] Total weight of molten steel: 60 tons;
[0043] Pouring time: 30min;
[0044] Hydraulic cylinder pressurization time: 50 minutes after pouring, gradually increase the hydraulic cylinder pressure.
[0045] Maximum pressure on one side of wide and thick slab: 4 hydraulic cylinders are arranged on each water-cooled movable mold, the maximum pressure exerted by a single hydraulic cylinder is 90 tons, and the maximum pressure on one side of wide and thick slab is 360 tons.
[0047] Pressure holding time of the hydraulic cylinder: 90 minutes. After the end of the pressure holding, the hydraulic cylinder applies reverse pressure to separate the water-cooled movable mold from the wide and thick slab.
[0048] The gap between the wide and thick slab and the water-cooled movable mold: 15mm.
[0049]Subsequent monitoring of the surface temperature of the sl...
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Abstract
The invention relates to the field of wide and thick plate blanks for a wide and thick plate mill, in particular to a manufacturing process of a high-quality wide and thick plate blank, which is used for manufacturing a wide and thick plate blank for a wide and thick plate mill and solving the problems of higher manufacturing cost, lower efficiency and the like in the prior art, wherein the thickness of the wide and thick plate blank is 350 to 1,200mm. A water-cooling moving die is separately arranged on the front, back, left and right four faces of a tool water-cooling chassis; and the water-cooling moving dies arranged on the front, back, left and right four faces and the water-cooling chassis arranged on the lower part form a combined water-cooling die. The wide and thick plate blank is manufactured by using a high-efficiency water-cooling blank casting machine; and the high-efficiency blank casting machine adopts a hydraulic power system to extrude a casting blank, so that the wide and thick plate blank is solidified and crystallized under the action of a pressure, and internal shrinkage cavities and looseness of the wide and thick plate blank are eliminated. At the same time, a clearance between the die and the casting blank is controlled, the interface heat exchange coefficient between the casting blank and the die is adjusted, and surface cracks of the wide and thick plate blank are eliminated, by using the hydraulic power system, so the wide and thick plate blank with high quality is obtained finally.
Description
technical field [0001] The invention relates to the field of wide and thick slabs for wide and thick plate rolling mills, in particular to a high-quality wide and thick slab manufacturing process. Background technique [0002] Wide and thick plates are widely used in my country's economic construction, and are widely used in large ships, ocean-going platforms, hydropower units, thermal power units and long-distance pipelines. my country has recently built dozens of new wide and heavy plate rolling production lines, including Anshan Iron and Steel's 5000mm and 5500mm rolling mills, Baosteel's 5000mm rolling mills, etc., with a new capacity of more than 20 million tons. [0003] Usually, the application environment of wide and thick plates is relatively harsh, requiring high strength and performance uniformity of wide and thick plates, and the key to determine the performance of wide and thick steel plates is wide and thick slabs. Only when the thickness of the wide and thick...
Claims
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Application Information
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IPC IPC(8): B22D7/00B22D7/06B22D27/11
Inventor 栾义坤傅排先夏立军李殿中康秀红李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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