Heating type pressurizing water-cooled steel ingot mold and cooling method

Abstract

The invention relates to a heating type pressurizing water-cooled steel ingot mold and a cooling method. The heating type pressurizing water-cooled steel ingot mold comprises a heating device, a cooling device, a gas circulation device, a casting box, a rotating component and a central control computer, wherein the heating device is movably connected to the casting box, the gas circulation device is fixed to the upper wall of the casting box, the casting box is fixedly connected to the rotating component, and the cooling device is arranged at the outer side of the casting box; and the central control computer remotely controls the heating device, the rotating device and the cooling device. A first electric push rod is connected to a heat-insulating column casing through a connecting rod; and a second electric push rod is fixed to the upper wall in the column casing through bolts According to the heating type pressurizing water-cooled steel ingot mold and the cooling method, step-by-step heating of the center of casting dressing, nitrogen pressure applying in the forming process and graded cooling water flow control can be achieved, the defects of center line shrinkage and shrinkage porosity after a large alloy steel ingot is cooled and formed can be effectively overcome, macrosegregation in the metal forming process is relieved, and the use performance of the large alloy steel ingot is improved.

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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