A device and method for improving solidification quality of electroslag steel and reducing element segregation

Abstract

The invention discloses a piece of equipment and a method for improving the solidifying quality of electroslag steel and reducing the element segregation. The equipment comprises a gas supply system,a looped pipeline system and a smelting system; the gas supply system comprises a gas storage cylinder, a reducing valve, a voltage stabilizer and a gas guide pipe; the looped pipeline system comprises a gas inlet end electromagnetic valve, a gas inlet end electromagnetic valve controller, a looped pipeline, a gas outlet end electromagnetic valve and a gas outlet end electromagnetic valve controller; the smelting system comprises a crystallizer, and a bottom plate is arranged at the bottom part of the crystallizer; the gas guide pipe and the looped pipeline are connected; and the looped pipeline system is fitted between the crystallizer and the bottom plate, or embedded in the crystallizer, or embedded in the bottom plate. The method is as follows: when a gap is formed between an ingot andthe crystallizer because of the ingot formed in a molten pool in the smelting, the looped pipeline system is used to introduce helium into the gap from the bottom part of the crystallizer, and the relatively strong thermal conductance of the helium is used to improve the cooling effect of cooling water on the ingot, so that the high-quality electroslag steel even in ingredients and relatively high in solidifying quality is obtained.

Description

Technical field: [0001] The invention belongs to the technical field of metallurgy and casting, and in particular relates to a device and a method for improving the solidification quality of electroslag steel and reducing element segregation. Background technique: [0002] In recent years, the level of my country's equipment manufacturing industry has been continuously improved, and extreme manufacturing has become a prominent technological development trend of the equipment manufacturing industry. One of them is to develop in the direction of ultra-large. The industry has put forward higher requirements. The future will be a critical period for China to promote industrialization. Electric power, petrochemical, metallurgy, shipbuilding, aviation and other industries will continue to develop rapidly, which breeds unprecedented demand for large castings and forgings. [0003] At present, the supply of large-scale castings and forgings in the world is obviously in short supply....

AI Technical Summary

Problems solved by technology

[0006] In the existing production process of large ingots, due to the use of argon as the protective gas or no protective gas, after the molten steel solidifies, due to volume shrinkage, an air gap will be formed between the crystallizer and the steel ingot. When the air or After argon enters the air gap, due to its poor thermal conductivity, it will reduce the cooling effect of the cooling water on the ingot and prolong the cooling time of the ingot, thereby intensifying the segregation of the ingot composition and affecting the solidification quality of the electroslag steel

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