A production process of electroslag remelting

Abstract

The invention relates to an electroslag remelting control process. In the conventional electroslag ingot production, the electroslag remelting control process is performed in order to improve the quality of the final solidification end, namely the riser end, and based on a feeding procedure in the electroslag remelting course; according to the conventional process control mode in a feeding periodfor electroslag remelting, the whole course starting from the feeding operation to the completion of melting comprises the following procedures: the voltage and the current are reduced step by step, and the depth of a molten pool is reduced; since the water cooling intensity is stable and kept unchanged in the whole remelting stage, different-weight bright shrinkage holes and dark shrinkage holesor serious looseness exists at the riser end of a produced electroslag ingot, and the improvement of the electroslag ingot forging quality and that of the material utilization ratio are hindered; through the electroslag remelting control process provided by the invention, the voltage and the current are reduced at the beginning of the feeding period under the situation that the water cooling intensity is kept unchanged; and according to the feeding times of different ingot types, the remelting slag temperature is improved and the solidification time of molten steel at the top is delayed by increasing the voltage and the current within a certain period of time before the completion of feeding, so that the riser end of the electroslag ingot can be filled with enough molten steel, the clearance formed during the solidification of an electroslag ingot body can be sufficiently supplemented, and the purpose of improving the quality of the riser end can be fulfilled.

Description

technical field [0001] The invention belongs to the technical field of electroslag remelting production technology, and specifically relates to an electroslag remelting production technology capable of optimizing the feeding effect of electroslag ingots, reducing the generation of shrinkage cavities, and improving the quality of the riser end of electroslag ingots. Background technique [0002] At present, the electroslag remelting process commonly used by various iron and steel production enterprises is to gradually reduce the voltage and current from the beginning to the end of the feeding period. Due to the increasingly fierce market competition in the industry, the lower sales price and better quality of electroslag ingots have become the competitive advantages of enterprises. The control of cost and price and the improvement of yield are currently the direction of research for electroslag ingot manufacturers. The electroslag remelting process is realized by converting e...

AI Technical Summary

Problems solved by technology

Since the water cooling strength during the whole remelting stage is stable, there are obvious shrinkage cavities, dark shrinkage cavities or serious porosity at the riser end of the produced electroslag ingots, which hinders the forging quality of the electroslag ingots. and further improvement of material utilization

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