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Preparation method and application of DP980 chilled steel strip

A steel strip, chilled technology, applied in the field of preparation of DP980 chilled steel strip, can solve problems such as lack of technology

Pending Publication Date: 2022-01-21
SD STEEL RIZHAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem of relatively lacking techniques for producing continuous annealing and galvanizing products with the same composition in the existing DP steel production, the present invention provides a preparation method and application of a DP980 chilled steel strip. The same DP980 chilled steel strip The belt can produce both continuous annealing products and galvanized products, and can obtain low-cost production and excellent performance dual-phase steel without reducing the surface quality of the product

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  • Preparation method and application of DP980 chilled steel strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of DP980 chilled steel strip is obtained according to the following preparation method:

[0037] (1) According to the mass percentage, C: 0.082%, Si: 0.212%, Mn: 1.410%, P: 0.008%, S: 0.0050%, Als: 0.042%, Cr: 0.452%, Mo: 0.205%, Nb: 0.042%, N: 0.002%, the rest is Fe and unavoidable impurities. The chemical composition of the product is configured with molten steel, and the molten steel is smelted. The continuous casting process of the molten steel is protected by blowing argon throughout the process to avoid oxidation of the molten steel; a medium-carbon covering agent is used to avoid exposure of the molten steel , the secondary cooling water is distributed according to the model to avoid problems such as nozzle blockage and excessive inclusions in the continuous casting process, and ensure the surface quality of the slab; the continuous casting process uses mold slag;

[0038] (2) Hot rolling the continuous casting slab to obtain a hot-rolled plate, the heatin...

Embodiment 2

[0045] A kind of DP980 chilled steel strip is obtained according to the following preparation method:

[0046] (1) According to mass percentage, C: 0.095%, Si: 0.252%, Mn: 1.456%, P: 0.008%, S: 0.0048%, Als: 0.045%, Cr: 0.455%, Mo: 0.212%, Nb: 0.035%, N: 0.002%, the rest is Fe and unavoidable impurities. The chemical composition of the product is configured with molten steel to smelt the molten steel. The continuous casting process of the molten steel is protected by blowing argon throughout the process to avoid the oxidation of the molten steel; a medium-carbon covering agent is used to avoid the exposure of the molten steel , the secondary cooling water is distributed according to the model to avoid problems such as nozzle blockage and excessive inclusions in the continuous casting process, and ensure the surface quality of the slab; the continuous casting process uses mold slag;

[0047] (2) Hot rolling the continuous casting slab to obtain a hot-rolled plate, the heating t...

Embodiment 3

[0054] A kind of DP980 chilled steel strip is obtained according to the following preparation method:

[0055] (1) According to mass percentage, C: 0.109%, Si: 0.305%, Mn: 1.505%, P: 0.006%, S: 0.0046%, Als: 0.048%, Cr: 0.523%, Mo: 0.252%, Nb: 0.045%, N: 0.003%, and the rest is Fe and unavoidable impurities. The chemical composition of the product is configured with molten steel to smelt the molten steel. The continuous casting process of the molten steel is protected by blowing argon throughout the process to avoid the oxidation of the molten steel; a medium-carbon covering agent is used to avoid the exposure of the molten steel , the secondary cooling water is distributed according to the model to avoid problems such as nozzle blockage and excessive inclusions in the continuous casting process, and ensure the surface quality of the slab; the continuous casting process uses mold slag;

[0056] (2) Hot rolling the continuous casting slab to obtain a hot-rolled plate, the heati...

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Abstract

The invention relates to the technical field of steel rolling, in particular to a preparation method and application of a DP980 chilled steel strip. The preparation method comprises the following steps: (1) smelting molten steel; (2) carrying out hot rolling on a continuous casting blank to obtain a hot-rolled plate; coiling the hot-rolled plate; and (3) carrying out acid rolling on the hot-rolled plate to obtain a chilled steel strip. The DP980 chilled steel strip can be used for producing continuous annealing products and / or galvanized products. The DP980 chilled steel strip can be used for producing continuous annealing products as well as galvanized products, and dual-phase steel which is produced at low cost and has excellent performance can be obtained on the premise that the surface quality of the products is not reduced.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a preparation method and application of a DP980 chilled steel strip. Background technique [0002] In recent years, with the development of automobile lightweight technology, the development direction of automobiles has focused on energy saving, emission reduction, weight reduction and safety improvement. At present, the high-strength steel used in automobiles accounts for more than 70% of the whole body. DP steel plays a very important role in the lightweight of automobiles because of its high strength, good ductility and high strain hardening. Therefore, it is used in automobile structural parts, It is widely used in load bearing. How to realize the low-cost production of DP steel has become an urgent problem to be solved. [0003] At present, the Chinese patent application CN110564928A discloses a method for producing hot-dip galvanized DP980 steel with different yield...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22C33/04C22C38/00C22C38/02C22C38/04C22C38/06C22C38/22C22C38/26C22C38/38C23C2/06C23C2/40
CPCC22C38/02C22C38/04C22C38/06C22C38/22C22C38/26C22C38/38C22C38/001C22C33/04C21D8/0205C21D8/0226C23C2/06C23C2/40C21D2211/008C21D2211/001C21D2211/005C21D2211/009C21D2211/002
Inventor 田祥省胡华东徐国军刘培星侯晓英任东雷凯宇凡
Owner SD STEEL RIZHAO CO LTD
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