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Experimental equipment and experimental method under dynamic soft reduction of continuous casting

A technology of experimental equipment and experimental method, applied in the field of experimental equipment under dynamic light reduction of continuous casting, can solve problems such as the inability to fully reproduce the technological process, and achieve the effect of improving center segregation and center porosity, and improving the internal quality of the slab.

Active Publication Date: 2012-12-12
BEIJING GUANGKEBOYE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The above-mentioned experimental method, its soft reduction action is not carried out under the real dynamic soft reduction working condition, and cannot completely reproduce the process of dynamic soft reduction

Method used

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  • Experimental equipment and experimental method under dynamic soft reduction of continuous casting
  • Experimental equipment and experimental method under dynamic soft reduction of continuous casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] The steel type is selected as low-alloy high-strength steel Q345B, the billet section is selected as 50mm×150mm, the cooling water volume of the crystallizer is controlled at 700-1600L / min, the secondary cooling ratio water volume is controlled at 0.05-0.2L / Kg, and the casting speed is controlled At 2.0m / min, the pouring temperature is controlled at 1570°C, and the metallurgical length is controlled within 2.5 meters.

[0045] 200Kg of molten steel from the vacuum melting furnace 1 is poured into the tundish 2, and the temperature of the molten steel in the tundish is measured by a continuous temperature measuring device to control the superheat of the molten steel in the tundish at 10-25°C.

[0046] The position of the nozzle of the tundish is pre-adjusted to align with the crystallizer 3 below. The molten steel flows into the crystallizer 3 whose lower opening is blocked by the dummy rod head. The molten steel gradually condenses along the periphery of the crystalliz...

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Abstract

The invention discloses experimental equipment and an experimental method under dynamic soft reduction of continuous casting. The experimental equipment comprises vacuum smelting equipment, a tundish, a crystallizer, a group of clamp rollers and a dynamic soft reduction device, which are arranged in a sequence by taking a vertical casting billet as a reference, as well as a secondary spray systemwhich provides secondary cooling for casting billets in the group of the clamp rollers and the casting billets of the dynamic soft reduction device. By adopting the experimental equipment and the experimental method, on the one hand, the improving action of dynamic soft reduction on the internal quality of the casting billets under different technical conditions can be studied, and on the other hand, the best dynamic soft reduction mode and technical parameters can be determined aiming at different continuous casting technological conditions, so that the internal quality of the casting billets can be improved.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and continuous casting, and in particular relates to an experimental equipment and an experimental method for dynamic soft reduction of continuous casting. Background technique [0002] With the improvement of continuous casting level, soft reduction technology has become one of the most effective technologies to solve the center segregation and center porosity of billet. [0003] The so-called light reduction refers to compensating the solidification shrinkage of the slab by applying pressure near the solidification end of the slab to generate a certain amount of reduction. On the one hand, it can eliminate or reduce the internal voids formed by the shrinkage of the slab, and prevent the molten steel enriched in solute elements between grains from flowing laterally to the center of the slab; The molten steel enriched with solute elements flows in the opposite direction along the casting dire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/124B22D11/128B22D11/16G01N33/20
Inventor 田陆吴波
Owner BEIJING GUANGKEBOYE SCI & TECH
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