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A kind of equipment and method for preparing composite steel ingot

A composite steel and equipment technology, which is applied in metallurgy and casting fields, can solve problems such as insufficient cooling strength, low production efficiency, and excessive size, and achieve the effects of simplifying production equipment, increasing productivity, and improving quality

Active Publication Date: 2019-01-29
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large size of the steel ingot and insufficient cooling intensity, problems such as segregation, porosity and shrinkage cavity are unavoidable in the multi-furnace continuous casting method, electroslag remelting method and corresponding production equipment.
In recent years, the technology and equipment for preparing metal layered composite materials by casting method (CN 101125362A), double crystallizer method (US8418748132), and core electroslag remelting method (US4544019) have greatly improved the internal quality of steel ingots, but the industry is complicated. , high cost, low production efficiency and difficult to control

Method used

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  • A kind of equipment and method for preparing composite steel ingot
  • A kind of equipment and method for preparing composite steel ingot
  • A kind of equipment and method for preparing composite steel ingot

Examples

Experimental program
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Effect test

Embodiment 1

[0076] A device for preparing a composite steel ingot, comprising a conductive crystallizer, a consumable electrode assembly, a first power source, such as figure 1 Its front sectional view is shown, wherein the conductive crystallizer 1 is a cylindrical structure with an upper opening and a lower opening with a first diameter, a plurality of consumable electrodes 2 constitute a consumable electrode assembly, and a plurality of consumable electrodes Stretch into this tubular structure from the upper opening of the conductive crystallizer 1, and have a certain distance from the inner circumferential surface of the tubular structure, and this distance is recorded as the first distance; the first distance is less than half of the first diameter, so as to ensure The consumable electrode moves up and down along the inner circumferential surface of the cylindrical structure; the conductive crystallizer 1 and the consumable electrode assembly are electrically connected through the fir...

Embodiment 2

[0103] This embodiment is on the basis of embodiment 1, the equipment for preparing composite steel ingot prepares composite steel ingot, as Figure 4a As shown in , the first cable 5 is connected to the dummy plate on the ingot drawing device 4 , and the first switch 14 controls the connection and disconnection of the dummy plate on the ingot drawing device 4 with the first power supply 9 and the conductive section 7 .

[0104] The difference between the preparation method and Example 1 is that after the molten slag is poured into the conductive crystallizer, as Figure 4a As shown, the consumable electrode 2 is not lowered earlier, and the switch 14 is closed to form the circuit of the slag pool, the conductive section of the conductive crystallizer, the first power supply, the dummy plate and the mandrel of the ingot pulling device. Now, the mandrel 8 can be preheated again due to the Joule heat of the slag pool. After the mandrel 8 is preheated to a certain temperature, t...

Embodiment 3

[0110] This embodiment is on the basis of Embodiment 1, and adopts a dual-power supply and dual-circuit power supply mode, such as Figure 5a As shown, in the equipment for preparing composite steel ingots, the conductive section 7 is connected to the dummy plate on the ingot drawing device 4 through a second cable provided with a second power supply 15 and a second switch 16 . Since the single power supply and dual circuits cannot match the power distribution of the upper and lower circuits well, dual power supplies are used for power supply. Regulate the power of the two loops.

[0111] On the basis of the preparation method of Example 1, the preparation is carried out, wherein the difference from Example 1 is: after pouring slag into the conductive crystallizer 1, as Figure 5a As shown in , do not lower the consumable electrode 2 first, but first close the second switch 16 to form the conductive section 7, the slag pool 12, the mandrel 8 and the dummy plate of the ingot d...

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Abstract

The invention relates to equipment for preparing composite steel ingots, which includes: a conductive crystallizer with an upper opening and a lower opening with a cylindrical structure having a first diameter, a consumable electrode assembly including a plurality of consumable electrodes, and a plurality of consumable electrodes. The upper opening of the extremely self-conducting crystallizer extends into the cylindrical structure and is spaced a first distance from the inner circumferential surface of the cylindrical structure; and a first power source electrically connected to the conductive crystallizer and the consumable electrode assembly; wherein the first distance is less than half the first diameter. The invention also provides a method for preparing a composite steel ingot. The consumable electrode is inserted into the molten slag, and the power supply circuit of the conductive crystallizer is connected to realize the compounding of the core rod and the outer layer of molten steel; the consumable electrode is realized through a liquid level detector. The melting speed and the ingot extraction speed are well matched to ensure the stability of the steel ingot compounding process. The device and method of the present invention can realize the preparation of large steel ingots, ensure the stable and orderly operation of the multi-layer composite process, improve the problems of segregation, porosity and shrinkage of large-sized steel ingots, while improving production efficiency and ensuring composite quality.

Description

technical field [0001] The invention relates to the technical field of metallurgy and casting, in particular to a device and method for preparing composite steel ingots. Background technique [0002] At present, a prominent technological development trend of the equipment manufacturing industry is extreme manufacturing. On the one hand, it is developing towards ultra-micro and ultra-fine, and on the other hand, it is developing towards ultra-large. The development of large-scale and complex equipment in the fields of electric power, petrochemical, and metallurgy has put forward higher requirements for the large-scale casting and forging industry, and the demand for large-scale steel ingots is increasing. [0003] In the million-kilowatt nuclear power unit, whether it is the second-generation plus or the third-generation AP1000 and CAP1400, there are a large number of castings and forgings with high technical requirements, large specifications, and complex shapes. Forgings w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/041B22D11/10B22D11/14
CPCB22D11/007B22D11/008B22D11/041B22D11/10B22D11/141
Inventor 董艳伍姜周华侯志文曹玉龙侯栋曹海波姚科安
Owner NORTHEASTERN UNIV LIAONING
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