Electroslag smelting casting device with additional electromagnetic stirring and method

Abstract

The invention relates to an electroslag casting device additionally provided with electromagnetic stirring and a method thereof. The electroslag casting device belongs to the technical field of special steel electroslag metallurgy and comprises a crystallizer, a crystallizer water jacket and an electromagnetic stirrer; an annular magnet is sleeved on the outer wall of the crystallizer and positioned at the middle-upper part of the crystallizer, a loop is wound on an iron core of the annular magnet, an electromagnetic stirrer water jacket is arranged at the periphery of the annular electromagnet, and the electromagnetic stirrer water jacket is communicated with the crystallizer water jacket; a melting consumable electrode forms molten steel drops which then enter a slag layer; the molten steel drops fall down in a spiral line way in the slag layer under the action of the rotary electromagnetic field and then enter a steel ingot liquid tank; the steel ingot liquid tank raises continuously and also enters into an effective magnetic field action region of the electromagnetic stirrer; and meanwhile, electric current in the molten steel is acted with the rotary magnetic field to produce the electromagnetic force which then drives the molten steel to rotate. The invention has simple equipment, and has the obvious functions of improving the surface quality, the subsurface quality and the solidifying tissue of a casting blank and the isometric crystal ratio, and lightening the internal defects, such as the center segregation, the center looseness, and the like.

Description

technical field [0001] The invention belongs to the technical field of electroslag metallurgy for special steel, and in particular relates to an electroslag melting casting device and method with external electromagnetic stirring. Background technique [0002] Electroslag casting has the unique triple function of improving metal cleanliness, controlling solidification structure and final forming to achieve blank refinement. However, when electroslag remelting high-alloy steel ingots, there are still problems of coarse crystal structure, macro-segregation, shrinkage cavity and shrinkage porosity of steel ingots. Especially these problems are more serious in medium and large forgings or castings. Therefore, improving the quality of electroslag remelting steel ingots and obtaining special steel with a uniform structure have important practical significance for the development of my country's industrial economy. The influence of electromagnetic stirring on the temperature field...

AI Technical Summary

Problems solved by technology

However, the crystallizer and the electromagnetic stirrer are independent, which reduces the penetration ability of the magnetic field and affects the function of the electromagnet.

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