Heated pressurized water-cooled steel ingot mold and cooling method

Abstract

The invention relates to a heated pressurized water-cooled steel ingot mold and a cooling method, which includes a heating device, a cooling device, a gas circulation device, a casting box, a rotating assembly and a central control computer; the heating device is movably connected with the casting box, and the gas circulation device It is fixed on the upper wall of the casting box, the casting box is fixedly connected with the rotating assembly, and the cooling device is arranged on the outside of the casting box; the central control computer remotely controls the heating device, the rotating device and the cooling device. The first electric push rod is connected with the heat insulation cylinder through a connecting rod; the second electric push rod is fixed on the inner upper wall of the cylinder through bolts. The invention can realize step-by-step heating of the center of the casting liquid, nitrogen pressure during the forming process, and step-by-step cooling water flow control, can effectively solve the center shrinkage cavity and shrinkage defects of large alloy steel ingots after cooling and forming, and reduce macroscopic defects in the metal forming process. Segregation, improve its performance.

Description

technical field [0001] The invention relates to the technical field of metallurgical casting, and relates to a mold for cooling and forming a large steel ingot, in particular to a heated pressurized water-cooled steel ingot mold and a cooling method. Background technique [0002] In order to meet the needs of modern industry to save the manufacturing cost of various devices, devices such as pressure vessels, boilers, drilling platforms and various ship plates are gradually becoming larger; the large unit weight (≥ 20t) and extra-thick (≥100mm) steel plates are also in increasing demand. At the same time, in order to ensure the safety and reliability of large-scale equipment, the quality requirements for the extra-thick steel plates used are becoming more and more stringent. Not only high strength is required, but also Steel cleanliness and homogeneity are required. [0003] Compared with continuous casting and traditional die casting technology, water-cooled die casting tec...

AI Technical Summary

Problems solved by technology

Macrosegregation is usually difficult to eliminate through subsequent processing, resulting in a large number of scrapped products; after dissecting a large steel ingot, it was found that a very serious axial shrinkage porosity zone was found, and a negative segregation area was found at the bottom of the steel ingot. worldwide problems, resulting in huge economic losses

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