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The Method of Bloom Continuous Casting to Produce 42crmoh Steel

A bloom and continuous casting technology, applied in the field of bloom 42CrMoH steel production, to achieve the effect of ensuring heat transfer uniformity, improving defect control, and ensuring overall quality

Active Publication Date: 2020-02-04
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some key specific content of the quality control of 42CrMoH steel continuous casting slabs produced by continuous casting of 360mm×450mm cross-section blooms has not been covered.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment is that a certain steelmaking plant adopts the method of the present invention to produce 360mm * 450mm section 42CrMoH steel continuous casting bloom. The specific implementation of the present invention is as follows: a tubular crystallizer is adopted, and the corner fillet size is R20mm; the water channel of the tubular crystallizer is designed as two-inlet and two-circuit to ensure the uniformity of heat transfer; the cooling water volume of the crystallizer is 3150L / min~ 3350L / min, water pressure 0.80MPa~0.90MPa, DN250 regulating valve is used to finely adjust the cooling water of the crystallizer; the electromagnetic stirring of the crystallizer is installed at a low position at the outlet of the crystallizer, and the covering height of the electromagnetic stirring equipment of the crystallizer is 350mm. The mouth is flush; the actual Gaussian magnetic field strength of the crystallizer electromagnetic stirring is 330±15Gs, the stirring current is s...

Embodiment 2

[0025] This embodiment is that a certain steelmaking plant adopts the method of the present invention to produce 360mm * 450mm section 42CrMoH steel continuous casting bloom. The specific implementation of the present invention is as follows: a tubular crystallizer is adopted, and the corner fillet size is R20mm; the water channel of the tubular crystallizer is designed as two-inlet and two-circuit to ensure the uniformity of heat transfer; the cooling water volume of the crystallizer is 3180L / min~ 3300L / min, water pressure 0.82MPa~0.87MPa, DN250 regulating valve is used to finely adjust the cooling water of the crystallizer; the electromagnetic stirring of the crystallizer is installed at a low position at the outlet of the crystallizer, and the covering height of the electromagnetic stirring equipment of the crystallizer is 350mm. The mouth is flush; the actual Gaussian magnetic field strength of the crystallizer electromagnetic stirring is 330±10Gs, the stirring current is s...

Embodiment 3

[0029] This embodiment is that a certain steelmaking plant adopts the method of the present invention to produce 360mm * 450mm section 42CrMoH steel continuous casting bloom. The specific implementation method of the present invention is as follows: a tubular crystallizer is adopted, and the corner fillet size is R20mm; the water channel of the tubular crystallizer is designed as two-inlet and two-circuit to ensure the uniformity of heat transfer; the cooling water volume of the crystallizer is 3200L / min~ 3350L / min, water pressure 0.85MPa~0.90MPa, DN250 regulating valve is used to finely adjust the cooling water of the crystallizer; the electromagnetic stirring of the crystallizer is installed at a low position at the outlet of the crystallizer, and the covering height of the electromagnetic stirring equipment of the crystallizer is 350mm. The mouth is flush; the actual Gaussian magnetic field strength of the crystallizer electromagnetic stirring is 330±12Gs, the stirring curre...

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Abstract

The invention relates to a bloom 42CrMoH steel continuous casting production method, and belongs to the technical field of bloom continuous casting production. The bloom 42CrMoH steel continuous casting production method is suitable for a bloom 42CrMoH steel continuous casting billet with the section being 360 mm*450 mm. According to the bloom 42CrMoH steel continuous casting production method, onthe basis of electromagnetic stirring of a mold, electromagnetic stirring equipment is additionally arranged between a secondary cooling zone and the solidification tail end, the mounting positions and the working parameters of the secondary cooling zone and the solidification tail end are reasonably designed, and by combining and controlling over the pouring molten steel superheat degree, the pouring speed, cooling parameters and a solidification tail end downward-pressing technology, the compactness and homogeneity of the bloom 42CrMoH steel continuous casting billet are improved; in addition, through the design of the round corner parameter of a tubular mold, corner cooling of the steel billet is optimized, and defect control of the corner of the cast billet is improved; through improvement of a cooling water circuit, the uniformity of heat transfer is ensured, and thus the thickness of a billet shell of the cast billet at an outlet of the mold is uniform; and high level control ofthe comprehensive quality of the bloom 42CrMoH steel continuous casting billet can be ensured.

Description

technical field [0001] The invention relates to a method for producing 42CrMoH steel by continuous casting of blooms, which is suitable for casting 42CrMoH steel blanks of 360mm×450mm section blooms and belongs to the technical field of bloom 42CrMoH steel production. Background technique [0002] 42CrMo steel is a medium-carbon high-strength alloy steel. As a raw material for high-speed train axles and other components, it is a key component that bears the quality of the train. During operation, it bears multiple complex stresses such as impact, rotation and bending, and harsh working environments. Therefore, many scholars at home and abroad have carried out in-depth research on it, mainly focusing on the microstructure changes of materials under loading conditions. For example, T. Miokovie et al. carried out cyclic temperature loading experiments on 42CrMo4 steel, and the microstructure observation showed that the change of the amount of molten carbon and the carbon compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/115B22D11/04B22D11/18
CPCB22D11/0406B22D11/115B22D11/18
Inventor 李红光陈天明陈亮李志强
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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