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Manufacturing tool of high-compact wide and thick plate blank for wide and thick plate rolling mill and method

A technology for manufacturing tooling and manufacturing methods, which is applied in the field of manufacturing wide and thick slabs for wide and thick plate rolling mills. It can solve problems such as oxidation inclusions, looseness, and cracks in slabs, and achieve the effects of uniform organization, crack elimination, and cost reduction.

Active Publication Date: 2011-08-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a manufacturing tooling and method for a high-density wide-thick slab for a wide-thick plate rolling mill, which solves the problems of slab oxidation inclusions, shrinkage cavities, looseness, cracks, etc.

Method used

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  • Manufacturing tool of high-compact wide and thick plate blank for wide and thick plate rolling mill and method
  • Manufacturing tool of high-compact wide and thick plate blank for wide and thick plate rolling mill and method
  • Manufacturing tool of high-compact wide and thick plate blank for wide and thick plate rolling mill and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Double-layer thermal insulation riser is adopted, the inner layer is 80mm thick lightweight high alumina brick, and the outer layer is 15mm thick thermal insulation cotton; the molten steel temperature is 1590°C, and the refining bag is refined by blowing argon outside the furnace to strictly control phosphorus, Sulfur content, P≤0.015%, S≤0.008%, pouring molten metal weight 60 tons, pouring time 25min, pouring temperature 1560°C. Fill the cavity with argon before pouring, and pour under the protection of argon. After 30 minutes of pouring, increase the pressure of the hydraulic cylinder to gradually increase the pressure of a single hydraulic cylinder to 50 tons. Keep the pressure for 3h and start to decompress. After 20 minutes, the pressure of the hydraulic cylinder is converted into tension, so that the movable mold gradually leaves the slab.

[0060]In terms of weight percentage, the composition of the slab material is: C 0.2%, Si 0.65%, Mn 1.2%, P≤0.015%, S≤0.00...

Embodiment 2

[0064] Double-layer insulation risers are adopted, the thickness of the inner layer of light high-alumina bricks is 60mm, and the thickness of the outer layer of insulation cotton is 25mm; the molten steel is released at a high temperature, and the temperature of the furnace is 1580°C, and it is refined by blowing argon outside the furnace in the refining bag, strictly controlled Phosphorus and sulfur content, P≤0.015%, S≤0.008%, pouring molten metal weight 58 tons, pouring time 25min, pouring temperature 1550°C. Fill the cavity with argon before pouring, and pour under the protection of argon. After 50 minutes of pouring, increase the pressure of the hydraulic cylinder to gradually increase the pressure of a single hydraulic cylinder to 80 tons. Keep the pressure for 3h and start to decompress. After 30 minutes, the pressure of the hydraulic cylinder is converted into tension, so that the movable mold gradually leaves the slab.

[0065] In terms of weight percentage, the co...

Embodiment 3

[0068] Double-layer insulation risers are adopted, the thickness of the inner layer of light high-alumina bricks is 100mm, and the thickness of the outer layer of insulation cotton is 30mm; the temperature of the molten steel is 1595°C, and the refining bag is refined by blowing argon outside the furnace to strictly control the content of phosphorus and sulfur , P ≤ 0.015%, S ≤ 0.008%, the weight of the poured molten metal is 62 tons, the pouring time is 28 minutes, the pouring temperature is 1565°C, the cavity is filled with argon before pouring, and the pouring is carried out under the protection of argon. After pouring for 60 minutes, increase the pressure of the hydraulic cylinder to gradually increase the pressure of a single hydraulic cylinder to 100 tons. Keep the pressure for 3h and start to decompress. After 10 minutes, the pressure of the hydraulic cylinder is converted into tension, so that the movable mold gradually leaves the slab.

[0069] In terms of weight per...

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Abstract

The invention relates to the field of manufacturing field of a wide and thick plate blank for a wide and thick plate rolling mill, in particular to a manufacturing tool of a high-compact wide and thick plate blank for the wide and thick plate rolling mill, solving the problems of oxidation with impurities, hole shrinkage, looseness, cracks and the like of the plate blank. The manufacturing tooling is provided with a heat-insulating riser, moving dies, water cooling inner sleeves, a long water gap, hydraulic cylinders, a water cooling chassis and a hydraulic power system providing the externalforce; all the moving dies are combined on the water cooling chassis by utilizing the external force, and the heat-insulating risers are arranged at the upper parts of the moving dies; simultaneously, the long water gap is preheated, and before casting, the long water gap is arranged at the center of a cavity to wait for casting; in the casting process, the long water gap and a ladle steel outletare butted, a ladle is opened, and molten steel enters the cavity from the long water gap; molten metal is solidified in a water cooling mold, the hydraulic system is adopted to provide external force, so as to lead the plate blank to be crystallized under the pressure action; after the solidification is finished, boxing and riser cutting are carried out on the wide and thick plate blank under the high-temperature state; and finally, the wide and thick plate blank is placed in a heat treatment furnace for annealing treatment.

Description

technical field [0001] The invention relates to the field of manufacturing wide and thick slabs for wide and thick plate rolling mills, in particular to a manufacturing tool and method for high-density wide and thick slabs for wide and thick plate rolling mills. 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 wi...

Claims

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Application Information

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IPC IPC(8): B22D7/00B22D7/06B22D27/11
Inventor 夏立军栾义坤李殿中傅排先胡小强李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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