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Method for realizing low superheat pouring of continuous casting process by using high-intensity magnetic field, and device for method

A technology of superheat degree and strong magnetic field, applied in the field of casting process and its equipment, can solve the problems of increasing the degree of nucleation and supercooling, and achieve the effects of increasing the degree of nucleation and supercooling, inhibiting nucleation, and simple equipment and process

Active Publication Date: 2012-11-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art, the object of the present invention is to provide a method for realizing low superheat pouring in the continuous casting process by using a strong magnetic field and a magnetic field intervention device for low superheat pouring of molten metal, which uses a stable and constant strong magnetic field to suppress metal melting. The nucleation of the body, increase the degree of nucleation undercooling, through the cooperative control of the degree of superheat and undercooling of the metal melt for low superheat pouring, overcome the problem of nozzle blockage that is easily caused during the low superheat pouring process, and significantly improve the casting slab The quality, equipment and process are simple, which is conducive to large-scale industrial production and application

Method used

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  • Method for realizing low superheat pouring of continuous casting process by using high-intensity magnetic field, and device for method
  • Method for realizing low superheat pouring of continuous casting process by using high-intensity magnetic field, and device for method

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Embodiment 1

[0025] A method of using a strong magnetic field to achieve low superheat pouring in the continuous casting process. By using a strong magnet to generate a constant strong magnetic field inside the tundish and the nozzle, under the action of the constant strong magnetic field, the metal melt flows through the nozzle It remains liquid below the liquidus temperature, that is, when it flows through the nozzle, the metal melt is in a supercooled state or a low superheated state without solidification, so that the metal melt flowing out of the outlet at the bottom of the nozzle is supercooled or low superheated. Heat way pouring into the crystallizer. In this embodiment, a stable and constant strong magnetic field is used to suppress the nucleation of the metal melt, increase the nucleation supercooling degree, and carry out low superheat pouring by synergistically controlling the superheat and subcooling of the metal melt to overcome the low superheat pouring process. The easy-to-...

Embodiment 2

[0030] The technical solution of this embodiment is basically the same as that of Embodiment 1, especially in that:

[0031] In this embodiment, in this embodiment, see figure 1 , Cooling device 6 adopts cooling air jacket. The cooling air jacket has an air outlet 4 and an air inlet 8 , and the height space position of the air outlet 4 is higher than that of the air inlet 8 . In this embodiment, the use of the cooling air jacket can save a lot of industrial water, reduce environmental pollution, and reduce infrastructure costs. Especially in water-scarce and dry climate areas, air cooling can be used instead of water cooling for continuous casting production.

Embodiment 3

[0033] The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, and the special features are:

[0034] In this example, see figure 2 At the same time, the strong magnet 5 is also installed on the outside of the tundish 3 in a non-contact manner, and the cooling device 6 is also installed between the tundish 3 and the strong magnet 5, and the strong magnet 5 generates a constant strength inside the tundish 3 The magnetic field controls the degree of superheating and subcooling of the molten metal 2 cooperatively. When the nozzle 7 is opened, the molten metal 2 flows smoothly from the tundish 3 through the nozzle 7 . In this embodiment, not only the strong magnet 5 is installed at the nozzle position, but also the strong magnet 5 applies a constant strong magnetic field to the metal melt 2 in the tundish 3, which expands the intervention area of ​​the external magnetic field and strengthens the constant temperature strong magnetic...

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Abstract

The invention discloses a method for realizing low superheat pouring of a continuous casting process by using a high-intensity magnetic field, and a device for the method. According to the method, a strong magnet produces the steady high-intensity magnetic field in metal melt, so the metal melt can still keep liquid state at the temperature of less than liquidus temperature when flowing through a water gap; the metal melt is in a supercooled state or a superheated state and is not solidified when flowing through the water gap, and the metal melt flowing out of an outlet at the bottom of the water gap is poured into a crystallizer in a supercooled or superheated mode. The invention also discloses a magnetic field intervention device for the low superheat pouring of metal liquid. The device comprises a superheat control system and a supercooling degree intervention system. According to the method and the device, the nucleation of the metal melt can be obviously inhibited by the steady high-intensity magnetic field, the supercooling degree of the melt can be improved, a large amount of isometric crystal textures can be obtained, the problem that the water gap is blocked easily in the low superheat pouring process can be avoided, the quality of casting blank can be improved obviously, equipment and the process are simple, and large-scale industrial production and application can be realized conveniently.

Description

technical field [0001] The invention relates to a pouring process and its equipment, in particular to a method and device for pouring with low superheat in a physical field, which can be used in the technical field of continuous casting. Background technique [0002] The degree of superheat has a very important influence on the structure, macrostructure and central segregation of the continuous casting slab. Studies have shown that casting with low superheat can make the slab obtain a wider equiaxed grain area and effectively improve the quality of the continuous casting slab. However, in the continuous casting process, pouring with low superheat can easily cause nozzle blockage. In order to achieve low-temperature pouring and prevent nozzle clogging, electromagnetic stirring technology is used in the mold area and the secondary cooling section area. These technologies effectively improve the central segregation of the slab and expand the equiaxed grain area in the slab. Ho...

Claims

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Application Information

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IPC IPC(8): B22D11/18
Inventor 任忠鸣李传军
Owner SHANGHAI UNIV
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