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Oxygen-bearing steel belt and production method thereof

A production method and steel strip technology, applied in the field of metallurgy, can solve the problems affecting the normal use of materials, low steel-aluminum composite performance, high oxygen content, etc., and achieve the effects of low production process cost, high production stability and wide application range

Inactive Publication Date: 2016-06-08
TANGSHAN IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some people use low-carbon steel or ultra-low carbon steel for the production of steel-aluminum composite strips. Due to problems such as high Al content and high oxygen content in steel, the performance of steel-aluminum composite is low, which affects the normal use of materials.
[0003] Due to the high content of Al in traditional ultra-low carbon steel, the continuous casting of molten steel is poor, and the production stability is not guaranteed.

Method used

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  • Oxygen-bearing steel belt and production method thereof
  • Oxygen-bearing steel belt and production method thereof
  • Oxygen-bearing steel belt and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An oxygen-containing steel strip, the mass fraction of chemical composition is: C: 0.007%, Mn: 0.22%, Si: 0.003%, S: 0.005%, P: 0.018%, Al: 0.002%, N: 0.0024%, [ O]: 0.0030%, the balance being iron and inevitable impurities.

[0029] Oxygen-containing steel strip production method, the specific steps are as follows:

[0030] Hot metal desulfurization: the molten iron is desulfurized, and the weight percentage of S is controlled to be 0.006%; converter smelting: the weight percentage of P is controlled to be 0.020%; refining outside the furnace; 0.002%, [O] 0.0050%; continuous casting: continuous casting uses a covering agent with a weight percentage of C of 0.1%, and uses argon gas for protective casting, and the argon gas flow rate is 10Nm 3 / h; continuous casting slab heating: heating temperature 1230°C; hot rolling: hot rolling process, control finish rolling temperature 870°C; coiling: control coiling temperature 640°C.

Embodiment 2

[0032] An oxygen-containing steel strip, the mass fraction of chemical composition is: C: 0.007%, Mn: 0.22%, Si: 0.003%, S: 0.005%, P: 0.016%, Al: 0.002%, N: 0.0022%, [ O]: 0.0028%, the balance being iron and inevitable impurities.

[0033] Oxygen-containing steel strip production method, the specific steps are as follows:

[0034] Hot metal desulfurization: the molten iron is desulfurized, and the weight percentage of S is controlled to be 0.005%; converter smelting: the weight percentage of P is controlled to be 0.018%; refining outside the furnace; 0.002%, [O] 0.0040%; continuous casting: continuous casting uses a covering agent with a weight percentage of C of 0.1%, and uses argon gas for protection casting, and the argon gas flow rate is 12Nm 3 / h; continuous casting slab heating: heating temperature 1255°C; hot rolling: hot rolling process, control finish rolling temperature 890°C; coiling: control coiling temperature 660°C.

Embodiment 3

[0036] An oxygen-containing steel strip, the mass fraction of chemical composition is: C: 0.008%, Mn: 0.15%, Si: 0.004%, S: 0.006%, P: 0.020%, Al: 0.003%, N: 0.0040%, [ O]: 0.0050%, the balance being iron and inevitable impurities.

[0037] Oxygen-containing steel strip production method, the specific steps are as follows:

[0038] Hot metal desulfurization: the molten iron is desulfurized, and the weight percentage of S is controlled to be 0.006%; converter smelting: the weight percentage of P is controlled to be 0.020%; refining outside the furnace; 0.003%, [O] 0.0050%; continuous casting: continuous casting uses a covering agent with a weight percentage of C of 0.1%, and uses argon gas for protective casting, and the argon gas flow rate is 11Nm 3 / h; continuous casting slab heating: heating temperature 1240°C; hot rolling: hot rolling process, control finish rolling temperature 885°C; coiling: control coiling temperature 655°C.

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Abstract

The invention discloses an oxygen-bearing steel belt and a production method thereof and belongs to the technical field of metallurgy. The oxygen-bearing steel belt comprises, by mass, 0-0.008% of C, 0.15%-0.45% of Mn, 0-0.004% of Si, 0-0.006% of S, 0-0.020% of P, 0.001%-0.003% of Al, 0-0.0040% of N, 0-0.0050% of [O], and the balance iron and inevitable impurities. The production method comprises the specific steps of molten iron desulphurization, converter smelting, external refining, continuous casting, continuous casting slab heating, hot rolling and crimping; the production method is characterized in that the content of the [O] is controlled to be 0-0.0050% through the step of external refining. The oxygen-bearing steel belt produced through the production method is good in steel-aluminum compound property and wide in application range, the tensile strength is 315 MPa or higher, and the yield strength is 246 MPa or higher. According to the oxygen-bearing steel belt and the production method thereof, the production process cost is low, and the production stability is high.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an oxygen-containing steel strip and a production method thereof. Background technique [0002] The traditional oxygen-containing steel is mostly boiling steel or quasi-boiling steel, and the application range of steel is limited. In recent years, some people use low carbon steel or ultra-low carbon steel for the production of steel-aluminum composite strips. Due to the high Al content and high oxygen content in the steel, the steel-aluminum composite performance is low, which affects the normal use of the material. [0003] Due to the high Al content of traditional ultra-low carbon steel, the continuous casting of molten steel is poor, and the production stability is not guaranteed. With the development of out-of-furnace refining equipment and the advancement of oxygen-determining instruments, precise control of C and O content in steel has become a reality. SU...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04
CPCC22C38/002C22C38/001C22C38/04
Inventor 杜洪波杨晓江李梦英梅淑文董继亮吴成钏陶维纯齐建群
Owner TANGSHAN IRON & STEEL GROUP
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