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

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...

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

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