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Continuous Casting Method for Quality Control of Bloom Heavy Rail Steel Corner

A technology of bloom and heavy rail steel, which is applied in the continuous casting field of quality control of the corners of bloom and heavy rail steel, and achieves the effects of ensuring comprehensive quality, improving defect control, and ensuring high-level control.

Active Publication Date: 2021-01-22
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific research on the quality control equipment and technology of the heavy rail steel corner of the 280mm×380mm section bloom does not involve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this embodiment, a steelmaking plant adopts the equipment technology of the present invention to produce U75V heavy rail steel with a section of 280mm×380mm. The specific embodiment of the present invention is: the size of the upper opening of the crystallizer is 292.2mm × 392.5mm, the size of the lower opening of the crystallizer is 287.1mm × 388.0mm, and the size of the corner is R20mm arc angle; the size of the middle part of the crystallizer is shown in the following table:

[0022] .

[0023] Secondly, the water channel of the tubular crystallizer is designed as two-inlet and two-circuit to ensure the uniformity of heat transfer. In addition, the cooling water volume of the crystallizer is controlled at 2750L / min~2900L / min, and the water pressure is controlled at 0.82MPa~0.90MPa.

[0024] The present invention also needs the technical conditions of the normal casting process as a matching supplement, and the specific control requirements are as follows: the s...

Embodiment 2

[0027]This embodiment is that a certain steelmaking plant adopts the equipment technology of the present invention to produce 280mm * 380mm section U71Mn heavy rail steel. The specific embodiment of the present invention is: the specific size of the crystallizer (including the size of the upper mouth, the size of the lower mouth, the size of the middle, and the size of the corners) is the same as that of Example 1; secondly, the waterway of the tubular crystallizer is designed to be two-inlet and two-circuit, ensuring Uniformity of heat transfer. In addition, the cooling water volume of the crystallizer is controlled at 2700L / min~2870L / min, and the water pressure is controlled at 0.80MPa~0.87MPa.

[0028] The present invention also needs the technical conditions of the normal casting process as a complementary supplement, and the specific control requirements are as follows: the superheat degree of pouring molten steel (the superheat degree of molten steel in the tundish) is c...

Embodiment 3

[0031] This embodiment is that a certain steelmaking plant adopts the equipment technology of the present invention to produce 280mm * 380mm section U78CrV heavy rail steel. The specific embodiment of the present invention is: the specific size of the crystallizer (including the size of the upper mouth, the size of the lower mouth, the size of the middle, and the size of the corners) is the same as that of Example 1; secondly, the waterway of the tubular crystallizer is designed to be two-inlet and two-circuit, ensuring Uniformity of heat transfer. In addition, the cooling water volume of the crystallizer is controlled at 2740L / min~2900L / min, and the water pressure is controlled at 0.82MPa~0.90MPa.

[0032] The present invention also needs the technical conditions of the normal casting process as a complementary supplement, and the specific control requirements are as follows: the superheat degree of pouring molten steel (the superheat degree of molten steel in the tundish) is...

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Abstract

The invention relates to a quality-control continuous casting method of a bloom heavy rail steel angle part. The quality-control continuous casting method of the bloom heavy rail steel angle part is suitable for a bloom heavy rail steel casting blank with the cross section being 280mm x 380mm, and belongs to the technical field of bloom heavy rail steel continuous casting production. According tothe quality-control continuous casting method of the bloom heavy rail steel angle part provided by the invention, a tubular crystallizer facility with the gradient taper is adopted, and the concrete size of the crystallizer is reasonably designed, so that the crystallizer is simple in structure and easy to manufacture and maintain, the cooling of the casting blank angle part is optimized, and thedefect control of the casting blank angle part is improved. In addition, through designing a circular bead parameter of the tubular crystallizer, the defect control of the casting blank angle part isfurther improved; and through improving a cooling water circuit, the homogeneity in heat transfer is ensured. Finally, by combining with the control of the pouring liquid steel superheat degree, the pouring speed, the electromagnetic stirring parameter, the cooling parameter and the like, the comprehensive quality of the bloom heavy rail steel continuous casting blank is high-level controlled.

Description

technical field [0001] The invention relates to a continuous casting method for the quality control of heavy rail steel corners of a bloom, which is suitable for heavy rail steel casting blanks with a cross section of 280mm×380mm, and belongs to the technical field of continuous casting production of heavy rail steel. Background technique [0002] Steel rails are the main components of railway tracks. During railway transportation, to provide effective support and guidance for locomotives, they need to bear huge vertical pressure from wheels. Based on the development needs of my country's infrastructure construction, railway transportation is developing at a rapid speed, and it is becoming more and more high-speed and heavy-duty. The size of rails is also gradually increasing. In order to reduce welded joints and ensure higher integrity of railway rails, the length of large-size rails is also increasing. The rolling of large-size and long-length rails with smaller cross-sec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16B22D11/22B22D11/115
CPCB22D11/009B22D11/115B22D11/16B22D11/22
Inventor 李红光陈天明陈亮李志强
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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