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Vanadium-containing hot-based galvanized sheet and preparation method thereof

A technology of galvanized sheet and substrate, applied in the field of metallurgy, can solve the problems of poor steel plasticity, low elongation, poor welding performance, etc.

Pending Publication Date: 2022-01-21
HEBEI IRON AND STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the market is strengthened by C, Mn or Nb, Ti. C, M strengthening can significantly improve the strength of steel, but usually the welding performance is poor. The crystallized banded deformation structure increases the strength, but the plasticity of the steel is poor, and the elongation after fracture is low
With the addition of vanadium, the vanadium-containing heat-based galvanized sheet can effectively improve the strength and plasticity of the steel, but the surface quality is difficult to control

Method used

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  • Vanadium-containing hot-based galvanized sheet and preparation method thereof
  • Vanadium-containing hot-based galvanized sheet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A vanadium-containing heat-based galvanized sheet, the substrate of which includes the following components in mass percentage: C: 0.175%, Si: 0.12%, Mn: 0.26%, P: 0.011%, V: 0.051%, S: 0.02%, Cu : 0.014%, Ni: 0.023%, Cr: 0.027%, the balance is Fe and unavoidable impurities.

[0030] The preparation method of above-mentioned vanadium-containing heat-based galvanized sheet is:

[0031] The molten steel conforming to the composition of the above vanadium-containing hot-base galvanized sheet substrate is cast into continuous casting slabs, and the finished coils are rolled off the production line in the hot rolling production line, and then undergo three-stage pickling, five-stage rinsing, annealing, galvanizing, gas Knife purging, post-plating cooling, skin pass and coiling processes to obtain vanadium-containing heat-based galvanized sheet;

[0032] Among them, the three-stage pickling requirements: uncoiler tension 45KN, entrance looper tension 48KN, scale breaking mac...

Embodiment 2

[0044] A vanadium-containing heat-based galvanized sheet, the substrate of which includes the following components in mass percentage: C: 0.13%, Si: 0.12%, Mn: 0.25%, P: 0.01%, V: 0.042%, S: 0.005%, Cu : 0.01%, Ni: 0.018%, Cr: 0.02%, the balance is Fe and unavoidable impurities.

[0045] The preparation method of above-mentioned vanadium-containing heat-based galvanized sheet is:

[0046] The molten steel conforming to the composition of the above vanadium-containing hot-base galvanized sheet substrate is cast into continuous casting slabs, and the finished coils are rolled off the production line in the hot rolling production line, and then undergo three-stage pickling, five-stage rinsing, annealing, galvanizing, gas Knife purging, post-plating cooling, skin pass and coiling processes to obtain vanadium-containing heat-based galvanized sheet;

[0047] Among them, the three-stage pickling requirements: uncoiler tension 40KN, entrance looper tension 55KN, scale breaker tension...

Embodiment 3

[0059] A vanadium-containing heat-based galvanized sheet, the substrate of which includes the following components in mass percentage: C: 0.14%, Si: 0.13%, Mn: 0.257%, P: 0.008%, V: 0.045%, S: 0.005%, Cu : 0.01%, Ni: 0.012%, Cr: 0.015%, the balance is Fe and unavoidable impurities.

[0060] The preparation method of above-mentioned vanadium-containing heat-based galvanized sheet is:

[0061] The molten steel conforming to the composition of the above vanadium-containing hot-base galvanized sheet substrate is cast into continuous casting slabs, and the finished coils are rolled off the production line in the hot rolling production line, and then undergo three-stage pickling, five-stage rinsing, annealing, galvanizing, gas Knife purging, post-plating cooling, skin pass and coiling processes to obtain vanadium-containing heat-based galvanized sheet;

[0062] Among them, the three-stage pickling requirements: uncoiler tension 48KN, entrance looper tension 52KN, scale breaking mac...

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Abstract

The invention belongs to the technical field of metallurgy, and particularly relates to a vanadium-containing hot-based galvanized sheet and a preparation method thereof, and a base plate of the vanadium-containing hot-based galvanized sheet comprises the following chemical components in percentage by weight: 0.15-0.20% of C, 0.10-0.15% of Si, 0.25-0.29% of Mn, less than or equal to 0.02% of P, 0.03-0.06% of V, less than or equal to 0.01% of S, less than or equal to 0.02% of Cu, less than or equal to 0.03% of Ni, less than or equal to 0.03% of Cr and the balance of Fe and inevitable impurities. The preparation method of the base plate conforming to the components comprises the processes of three-stage acid pickling, five-stage rinsing and the like, and specific acid pickling parameters are adopted. The vanadium-containing hot-based galvanized plate obtained by combining the strip steel with the components and the preparation method has excellent surface quality and high tensile strength, yield strength and corrosion resistance, and the high-strength use requirement of the hot-based galvanized plate is completely met.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a vanadium-containing heat-based galvanized sheet and a preparation method thereof. Background technique [0002] With the vigorous development and construction of the country, the application fields of steel continue to expand, the market demand for steel, especially corrosion-resistant steel, is increasing, and the requirements for anti-corrosion and mechanical properties of strip steel are getting higher and higher. Due to the advantages of strong corrosion resistance, excellent surface quality, good processing performance, and high cost performance, galvanized sheets are favored by customers. [0003] Most of the market is strengthened by C, Mn or Nb, Ti. C, M strengthening can significantly improve the strength of steel, but usually the welding performance is poor. The crystalline banded deformation structure increases the strength, but the plasticity of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/12C22C38/16C22C38/20C22C38/24C22C38/42C22C38/46C23C2/06C23C2/20C23C2/26C23C2/40C23G1/08C21D1/26C21D6/00C21D8/02
CPCC22C38/02C22C38/04C22C38/12C22C38/16C22C38/08C22C38/24C22C38/20C22C38/46C22C38/42C23G1/08C21D1/26C21D6/001C21D6/002C21D6/004C21D6/005C21D6/008C21D8/0205C21D8/0221C21D8/0247C23C2/06C23C2/40C23C2/20C23C2/26
Inventor 魏东华王猛唐嘉悦贾海超王广英赵一铎何昭民李晋
Owner HEBEI IRON AND STEEL
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