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Continuous casting production method of bloom gear steel slab

A production method and gear steel technology, applied in the field of bloom gear steel production, to achieve the effects of improved defect control, uniform shell thickness, and optimized cooling

Active Publication Date: 2020-02-04
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, some key specific content of the quality control of the 360mm×450mm section bloom gear steel billet is not covered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]This embodiment is that a certain steelmaking plant adopts the method of the present invention to produce 360mm * 450mm section 20CrMnTiH series gear 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 280±15Gs, the stirring...

Embodiment 2

[0026] This embodiment is that a certain steelmaking plant adopts the method of the present invention to produce 360mm * 450mm section 20CrMo series gear 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 3157L / mi~ 3340L / 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 280±5Gs, the stirring cur...

Embodiment 3

[0030] This embodiment is that a certain steelmaking plant adopts the method of the present invention to produce 360mm * 450mm section 22CrMo series gear 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 to be two-inlet and two-circuit to ensure the uniformity of heat transfer; the cooling water volume of the crystallizer is 3255L / 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 280±10Gs, the ...

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Abstract

The invention relates to a continuous casting production method for a bloom gear steel casting blank, is suitable for bloom gear steel casting blanks, the fracture surfaces of which are 360*450 mm, and belongs to the technical field of bloom gear steel production. Based on electromagnetic stirring of a crystallizer, an electromagnetic stirring device is additionally arranged between a secondary cooling zone and a solidification tail end, the mounting positions and working parameters of the secondary cooling zone and the solidification tail end are designed reasonably, and the degree of superheat, the casting speed, the cooling parameter and the like of casting molten steel are controlled in a combined manner, so that the compactness and the homogeneity of the bloom gear steel casting blankare enhanced. In addition, cooling of the corner of the casting blank is optimized by designing the circular bead parameters of the tubular crystallizer, so that corner defect control of the castingblank is improved. By improving a cooling water path, the heat transfer uniformity is ensured, so that the casting blank thicknesses at the outlet of the crystallizer are uniform. According to the method provided by the invention, the comprehensive quality of the bloom gear steel casting blank can be controlled at a high level.

Description

technical field [0001] The invention relates to a continuous casting production method of a bloom gear steel slab, which is suitable for a 360mm×450mm section bloom gear steel slab and belongs to the technical field of bloom gear steel production. Background technique [0002] Gears are important power transmission mechanical components. Gears in different working conditions and different parts have different stress conditions, and there will be differences in failure modes to varying degrees, and are affected by gear materials, processing technology, lubrication conditions, friction and gear geometric parameters. and load patterns and many other factors. The main failure modes are: tooth root fracture, tooth surface profile deformation caused by tooth surface depression, fatigue spalling, and wear are divided into adhesive wear and abrasive wear. According to the main failure modes mentioned above, the performance requirements for gear steel are high crush resistance and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/04B22D11/115B22D11/055B22D11/12B22D11/18B22D11/22
CPCB22D11/0406B22D11/055B22D11/115B22D11/122B22D11/18B22D11/225
Inventor 李红光陈天明陈亮冯远超
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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