A constant molten pool shape electroslag remelting method based on electrode speed control

A technology of speed control and electroslag remelting, which is applied in the field of electroslag remelting, can solve problems such as the deterioration of the ingot surface quality, the drop of the edge temperature of the molten pool, and the decrease of production efficiency, so as to improve the melting efficiency, reduce the temperature, and improve the production efficiency. Improved effect

Active Publication Date: 2022-02-01
NORTHEASTERN UNIV LIAONING
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AI Technical Summary

Problems solved by technology

In order to reduce the depth of the molten pool, the method of decreasing power or decreasing melting rate is usually used in actual production to continuously reduce the temperature of the slag pool and maintain the cooling rate of the metal molten pool. However, these conventional methods have many limitations. On the one hand, the power consumption increases , The production efficiency is reduced, on the other hand, the temperature at the edge of the molten pool also decreases, which is not conducive to the formation of a thin and uniform slag shell, causing the deterioration of the surface quality of the ingot
Therefore, there is no effective electroslag remelting method that can stably control the shallow and flat molten pool shape, take into account high-efficiency production and high solidification quality

Method used

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  • A constant molten pool shape electroslag remelting method based on electrode speed control
  • A constant molten pool shape electroslag remelting method based on electrode speed control
  • A constant molten pool shape electroslag remelting method based on electrode speed control

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Embodiment 1

[0040] Such as figure 1 The shown device can realize the electroslag remelting method of constant molten pool shape based on the electrode speed control, including the crystallizer 6, the bottom water tank 19, the consumable electrode 15, the conductive rod 12 and the column 1, and the bottom water tank 19 is fixed On the operation platform 7, the crystallizer 6 is placed on the bottom water tank 19. The consumable electrode 15 is welded to the end of the conductive rod 12, and the front end of the conductive rod 12 and the end of the rotating shaft 10 are fixed through a flange. The rotating shaft 10 is connected to the reducer 8 and the servo motor 9 through the belt drive 11, and the reducer 8 and the servo motor 9 are fixed on the load-bearing cross arm 2. The conductive rod 12 is covered with a copper shell 5, and the copper shell 5 is connected to the power supply system through a carbon brush conductive slip ring 4 and a conductive copper tube 13. The end and front end...

Embodiment 2

[0092] A device in this embodiment that can realize the electroslag remelting method with a constant molten pool shape based on electrode rotational speed control is the same as in Embodiment 1, the difference is that the size of the crystallizer is 120 mm in inner diameter and 1000 mm in height, and the size of the consumable electrode is It is 60mm in diameter and 2000mm in length, and the consumable electrode is made of 201 stainless steel. Using the above-mentioned device to carry out the electroslag remelting method based on the constant molten pool shape controlled by the electrode speed is carried out according to the following steps:

[0093] S1. Weld the consumable electrode and the end of the conductive rod coaxially, and the front end of the conductive rod is installed on the end of the rotating shaft through the flange;

[0094] S2. Start the cooling water circulation of the crystallizer and the bottom water tank, move the consumable electrode into the crystallizer...

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Abstract

In the electroslag remelting method based on the electrode rotation speed control, the electroslag remelting method with constant molten pool shape rotates the consumable electrode during the electroslag remelting process, and dynamically adjusts its rotation speed. The molten metal no longer converges centripetally but detaches from the outside of the electrode end earlier. The stirring of the electrode and the dispersion and dripping of molten droplets strengthen the convective heat transfer between the slag pool and the solid electrode, which significantly improves the melting efficiency of the electrode. Fixed electrode method, which can increase melting rate or production efficiency by up to 25%. The rotation of the electrode makes the temperature of the slag pool and the metal molten pool more uniform, and at the same time strengthens the convective heat transfer from the slag pool to the crystallizer, reduces the temperature of the slag pool, and is easy to form a shallower metal molten pool, which is beneficial to suppress electroslag Macroscopic defects such as segregation and porosity in steel ingots can improve the solidification quality of electroslag steel ingots.

Description

Technical field: [0001] The invention belongs to the technical field of electroslag remelting, and in particular relates to an electroslag remelting method based on electrode rotational speed control with constant melting pool shape. Background technique: [0002] Electroslag remelting is a special smelting process for the production of high-quality steel and alloys. It relies on the resistance heat generated by the current passing through the slag to melt the self-consumable electrode. The molten metal gathers into metal droplets and is refined in the slag pool. The metal molten pool is formed through the slag pool, and finally solidified into steel ingots sequentially under the cooling action of the crystallizer and the bottom water tank. The ingot produced by this method has the advantages of pure metal, compact structure, uniform composition and smooth surface. [0003] In the traditional electroslag remelting process, the molten droplets formed by the electrode melting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/18B22D23/10
CPCC22B9/18B22D23/10
Inventor 黄雪驰李宝宽刘中秋王芳李孟臻
Owner NORTHEASTERN UNIV LIAONING
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