Steel plate ingot casting device and method for producing ultra-thick steel plate cast ingot with same

Abstract

The invention discloses a steel plate ingot casting device, which comprises a pedestal, a fixed framework and an ingot mold, wherein the fixed framework is fixedly connected with the pedestal; the ingot mold is positioned in the fixed framework and consists of two pairs of side templates, i.e., front, rear, left and right side templates, and a bottom template; the outer sides of the side templates and the bottom template are respectively provided with a cooling water box; the side templates are provided with squeezing mechanisms; the bottom template is provided with a lifting mechanism; the side templates and the bottom template are all copper plate products; and the bottom template is provided with a runner port. According to the steel plate ingot casting device, deformation under cold and hot intensity stress can be avoided, and a shrinkage hole is avoided; since the solidification time is greatly shortened, the segregation in a steel ingot can be obviously relieved, thereby greatly improving the internal quality and the performance of a produced ultra-thick plate; and meanwhile, the steel plate ingot casting device has the advantages of freely adjustable ingot mold size, long service life of the ingot mold and the like.

Description

technical field [0001] The invention relates to the technical field of steel production, in particular to a steel plate ingot casting device and a method for producing extra-thick steel plate ingot casting with the device. Background technique [0002] With the continuous improvement of the level of modern industrialization and the intensification of global economic integration, the requirements for the variety and quality of steel products in the international market are also continuously increasing. The amount of high-grade extra-thick steel used in industries such as large ships and offshore oil platform legs is increasing. In the known technology, the steel plate for large-scale equipment is usually first casted by using a steel ingot mold, and then the steel plate is rolled and formed by a large-scale rolling equipment. The traditional ingot mold is generally a cast iron integral mold. The main defects of this mold are: 1) In the middle and late stages of the molten st...

AI Technical Summary

Problems solved by technology

The traditional ingot mold is generally a cast iron integral mold. The main defects of this mold are: 1) In the middle and late stages of the molten steel condensing in the mold, the mold absorbs a lot of heat and rises to a high temperature, and the heat dissipation of the mold mainly Relying on outward radiation, the speed of heat dissipation is very slow, resulting in a gradual decrease in the condensation rate of molten steel; 2) The steel ingot gradually shrinks as the temperature decreases during the entire condensation process, and an air gap is formed between the steel ingot and the inner wall of the mold. The existence of the steel ingot reduces the thermal conductivity between the steel ingot and the casting mold, and the crystallization speed of the steel ingot is greatly affected, resulting in coarse grains in the core of the steel ingot and obvious composition segregation, which directly affects the mechanical properties of the rolled steel plate; 3) The casting mold is prone to cracks , the service life is short, generally it can only be used for more than 30 times and then scrapped immediately, the mold cost per unit output is relatively high, and the average cost of mold consumption per ton of steel ingot is more than 80 yuan

The ingot mold can achieve a certain effect in increasing the condensation rate of molten steel during the pouring process of thin plate ingots, but its effect is very limited in the production of extra thick steel plate ingots, and it is still difficult to solve the problem of low cooling rate of molten steel. , Coarse crystal grains and prone to shrinkage porosity, shrinkage cavity and structural component segregation

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