Molten metal solidification device and heat preservation method thereof

Abstract

The invention discloses a molten metal solidification device and a heat preservation method thereof. A hollow cavity body is mounted on the periphery of an ingot mold, the cooling rate of a molten metal is adjusted by adjusting a cooling medium in the hollow cavity body to solidify the molten metal, the heat transferring uniformity of a temperature field is higher in the molten metal solidifying process by adjusting the cooling medium, thus the defects such as dendritic segregation and center porosity of a metal ingot are advantageously reduced, and the quality of the metal ingot is improved;meanwhile the hollow cavity body is mounted on the periphery of the ingot mold, thus the temperature difference of the inner surface and the outer surface of the ingot mold can be reduced, heat stressof the ingot mold in the cooling process of the molten metal is greatly reduced, and the service life of the ingot mold is advantageously prolonged; and the molten metal solidification device and theheat preservation method thereof are suitable for preparation of metal ingots of all the tonnages, the range of application is wide, the molten metal solidification device and the heat preservation method thereof can be suitable for preparation of carbon steel, alloy steel and non-ferrous metals, the technology is simple, easy to operate, reliable and safe, and the costs of investment and maintenance are low.

Description

technical field [0001] The invention relates to the technical field of preparation of die-casting steel ingots, in particular to a liquid metal solidification device and its heat preservation method, which are applied to the preparation of carbon steel, alloy steel and non-ferrous metals under vacuum and non-vacuum conditions, and are used for the production of metals of various materials. Defects such as shrinkage porosity, segregation, and deposition cones inside the ingot all have an inhibitory effect. Background technique [0002] In recent years, with the rapid development of my country's electric power industry, nuclear industry and petrochemical industry, the demand for large forgings is increasing, and the quality requirements for large forgings are also getting higher and higher; large forgings are energy, electricity, transportation The foundation of supporting equipment in important fields such as transportation and metallurgical machinery is an important symbol to...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the ingots produced in the domestic iron and steel metallurgy, non-ferrous metals and mechanical casting industries are to cast liquid metal into ingot molds to obtain various ingots of different sizes; the traditional method has obvious shortcomings, the liquid metal condenses for a long time and the ingot mold dissipates heat Directly affect the crystallization of molten steel, segregation of components, shrinkage cavities, cracks and other defects; The influence of hot solute convection, etc., makes the chemical composition of different regions of the steel ingot uneven, resulting in macro-segregation and micro-segregation; the mold design of the steel ingot has a decisive influence on the temperature field distribution of the steel ingot, directly affecting the distribution of shrinkage porosity defects inside the steel ingot, Therefore, optimizing the mold design and strengthening the thermal insulation performance of the ingot mold can improve the quality of the steel, eliminate the internal shrinkage cavity and porosity defects of the steel ingot, inhibit the segregation of the steel ingot, and improve the billet rate and utilization of the steel ingot are the problems that the industry needs to solve urgently.

[0004] In order to eliminate the shrinkage cavity and looseness inside the steel ingot, suppress the defects such as segregation and cracks of the steel ingot, and improve the billet forming rate of the steel ingot, technicians have developed some technologies; The method is to cast into the pipeline when casting the ingot mold, and the pipeline is passed through water, blast or ventilation to accelerate the cooling of the steel ingot mold, but these methods have poor cooling effect, and their production cost is very high, and the steel ingot mold is heated. The stress increases sharply and the service life is greatly reduced, so it has not been widely used

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