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Low-carbon silicon steel strip for cold rolling and producting process thereof

A production process, low-carbon and low-silicon technology, applied in the field of low-carbon and low-silicon steel strip production process for cold rolling, can solve the problems of unsatisfactory material quality, low yield, high hardness, etc., to solve the problem of cold rolling cracking, low strength , The effect of low inclusion content

Inactive Publication Date: 2005-08-24
LIANYUAN IRON & STEEL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of this die-casting process is that the yield from ingot to material is low, the cost is high, and the quality of the material is not ideal. The main problem is that there is high hardness and cracking in cold rolling, such as Q195 strip steel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Composition (weight) of low-carbon and low-silicon steel strips for cold rolling

[0026] C=0.06%, Si=0.05%, Mn=0.40%, P=0.01%, S=0.01%,

[0027] Al=0.009%, N=0.05%, O=0.05%, and the rest is Fe.

[0028] 2. Its production process is as described above.

Embodiment 2

[0030] 1. Composition (weight) of low-carbon and low-silicon steel strips for cold rolling

[0031] C=0.03%, Si=0.02%, Mn=0.30%, P=0.008%, S=0.008%,

[0032] Al=0.010%, N=0.02%, O=0.03%, and the rest is Fe.

[0033] 2. Its production process is as described above.

Embodiment 3

[0035] 1. Composition (weight) of low-carbon and low-silicon steel strips for cold rolling

[0036] C=0.08%, Si=0.09%, Mn=0.50%, P=0.035%, S=0.035%, Al=0.040%, N=0.07%, O=0.07%, and the rest is Fe.

[0037] 2. Its production process is as described above.

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PUM

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Abstract

The invention discloses a mild low-carbon low-silicon hot-rolled steel strip for cold-milling and producing technique, its chemical components: C 0.02-0.09%, Si 0.01-0.10%, Mn 0.20-0.60%, P 0.005-0.04% and S 0.005-0.04%, produced by calm steel link-casting process. Adopt 90-ton oxygen convertor top-bottom compound blowing smelting, steel package through blowing Ar gas, and less silicon and proper Al wire to deoxidize the liquid steel, adopt medium package inserted water gap protection residue to cast, the height of the liquid surface of the liquid steel controlled above 100mm, two cooling being weak cooling system.

Description

technical field [0001] The invention relates to a steel strip production process, in particular to a low-carbon and low-silicon steel strip production process for cold rolling. Background technique [0002] In the current formal metallurgical enterprises, for the boiling steel with low carbon, silicon and manganese content smelted from electric furnace or converter (especially converter), the molten steel is cast into a steel ingot with a certain geometric size by using a steel ingot mold, and then the billet is opened by the blooming mill. After rolling, this is called die casting-steel rolling process. However, the biggest disadvantage of this die-casting process is that the yield from ingot to material is low, the cost is high, and the quality of the material is not ideal. The main problem is that there is high hardness and cracking in cold rolling, such as Q195 strip steel. As for the killed steel, the "full continuous casting" production process of converter smelting i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06
Inventor 温德智谢集祥梁明曾全民谭启业刘亚非毕建民肖上工廖志
Owner LIANYUAN IRON & STEEL GROUP CO LTD
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