A pouring method to increase the material rate of 06cr18ni11ti steel ingot

Abstract

The invention discloses a pouring method for increasing the material rate of 06Cr18Ni11Ti steel ingots. The method includes adding an insulating refractory mud ring of pouring materials on the top of the existing steel mold, and setting a metal conductive ring on the inner wall of the insulating refractory mud ring. A mold slag layer is set at the bottom of the mold. During the pouring process of the pouring method, the mold slag floats up. First, it protects the molten steel. Second, when the mold slag enters the insulating refractory mud ring, the mold slag contacts the metal conductive ring. , the power supply forms a loop, and the mold slag generates heat due to its own resistance value and plays a proper role in supplementing and insulating the lower molten steel. The invention utilizes the protective slag layer laid on the top of the molten steel during the pouring process, which can protect the molten steel from oxidation and penetration of sundries; and eliminates scarring, heavy skin, shrinkage cavity and cracks that are easily formed on the upper layer of the steel ingot , porosity, segregation and other defects improve the quality of steel ingots and the rate of material used in post-processing of steel ingots.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a pouring method capable of increasing the material rate of steel ingots. Background technique [0002] Alloy steel smelting technology develops along the direction of increasing productivity, simplifying process, reducing production cost and improving steel quality. Its characteristics are mainly based on different uses. During the smelting process of ordinary steel, trace elements are added to improve the function of steel. 06Cr18Ni11Ti is a variety of alloy steel. Due to the addition of titanium, the viscosity of molten steel increases and the fluidity decreases. It cannot be directly made into bars and slabs by continuous casting. It can only be prepared by casting ingots first and then post-processing. Bars and slabs. In the process of ingot casting, improper control of injection speed and casting temperature will cause scarring, heavy skin, longitudinal and transverse c...

AI Technical Summary

Problems solved by technology

These defects reduce the material rate of the subsequent processing of steel ingots. The reason for this situation, according to the analysis of production practice, is that during the pouring process of the pouring method, the molten steel rises from the bottom to the steel mold, and the molten steel on the upper layer dissipates heat quickly. , long contact with air and other reasons, and mainly concentrated in the upper part of the steel ingot, in the subsequent processing, 8-12% of the upper part of the steel ingot can not be effectively used, resulting in a waste of resources

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