Cooling process for eliminating banded structure of steel ingot

A technology of strip structure and cooling process, applied in the field of steel ingot cooling, can solve the problems of excessive strip structure of steel ingot, inconsistent cooling speed, large difference in cooling speed, etc., so as to eliminate the influence of temperature, facilitate use, and avoid strip structure exceeding the standard. Effect
CN111136227AActive Publication Date: 2020-05-12SHANDONG BAODING HEAVY IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG BAODING HEAVY IND
Publication Date
2020-05-12

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Abstract

The invention relates to a cooling process for eliminating a banded structure of a steel ingot, and belongs to the technical field of steel ingot cooling. The cooling process comprises the following specific steps that (1) before pouring is carried out, a central pouring pipe and steel ingot molds are mounted on a pouring bottom plate; (2) pouring is started after mounting is finished; (3) a ventilation cooling device is prepared in advance, and a steel ingot air cooling device is hoisted to the position between the central pouring pipe and the steel ingot molds within 5 minutes after pouringis finished; (4) an air compressor is started, cold air is blown out from an air outlet hole of an air outlet pipe, and the steel ingot is cooled; and (5) after the steel ingot is cooled, the steel ingot molds are disassembled, the steel ingot is taken out, sampling detection is carried out, and the steel ingot is put in storage after being detected to be qualified. According to the cooling process, a heat insulation baffle is arranged between the steel ingot molds, and the size of the cold air flow is controlled in the cooling process, so that the situation that the banded structure exceeds the standard due to the fact that the cooling speed of the inner side and the outer side of the steel ingot is inconsistent can be effectively avoided.
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Description

technical field

[0001] The invention belongs to the technical field of steel ingot cooling, and in particular relates to a cooling process for eliminating banded structures of steel ingots. Background technique

[0002] When producing 17CrNiMo6 gear forgings, the method of pouring molten steel into the ingot mold and then cooling and forming is adopted. The poured steel ingot is located around the center injection pipe, and is cooled and formed by air cooling. However, in the process of air-cooling the steel ingot, the local cooling of the inner side of each steel ingot will be affected by other steel ingots, and the heat dissipation is very slow, resulting in a slow cooling rate of the inner side of the steel ingot. Then lead to when the upper and lower surfaces of the steel ingot are sampled at 120 degrees, there will always be a banded structure at the upper and lower points exceeding the standard, up to level 4, which cannot meet the user's level 2 requirements. Theref...

Claims

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