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Rolling process for low-energy-consumption headless ferrite strip steel production

A ferritic strip, low energy consumption technology, used in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of low temperature and heat history, large cost impact, high power consumption, and achieve good surface quality, reduce The effect of equipment investment and low intensity

Pending Publication Date: 2021-11-09
RIZHAO STEEL HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of traditional hot rolling and thin plate continuous casting and rolling processes represented by CSP, the development of "substituting heat for cold" is limited.
[0004] Although the current endless continuous casting and rolling of thin plates can produce thin-gauge steel strips, due to the compact structure of the production line, the casting slab is relatively thin, and the rolling process is subject to the influence of continuous casting casting speed, the temperature thermal history is relatively low, and the strength is low. High, making it difficult to replace cold-rolled products. At the same time, due to the existence of induction heating furnace, the power consumption is high, which has a great impact on the cost

Method used

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  • Rolling process for low-energy-consumption headless ferrite strip steel production
  • Rolling process for low-energy-consumption headless ferrite strip steel production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A ferritic steel strip, the ferritic steel strip contains the following components by weight percentage:

[0027] C 0.05%, Si 0.20%, Mn 0.30%, P 0.030%, S 0.015%, Nb+Ti+V=0.10%, balance iron.

[0028] The rolling process of the above-mentioned ferritic strip steel, the specific process is as follows:

[0029] (1) The molten steel is poured into the crystallizer through ladle casting, and after being crystallized by the mold, it is processed by a continuous casting machine at a casting speed of 4.8m / min to obtain a 120mm billet I;

[0030] (2) Casting slab I undergoes rough rolling and descaling treatment, cleans the surface oxide scale and mold slag, and then passes through the two-stand high-pressure rolling mill to obtain intermediate slab I with a thickness of 20mm, and control the temperature of intermediate slab I to 1020 ℃; the rolling capacity of a single large-reduction rolling mill is 4500t, and the reduction ratio is 80%;

[0031] (3) After the intermediate ...

Embodiment 2

[0035] A ferritic steel strip, the ferritic steel strip contains the following components by weight percentage:

[0036] C 0.04%, Si 0.10%, Mn 0.20%, P 0.015%, S 0.010%, Nb+Ti+V=0.05%, balance iron.

[0037] The rolling process of the above-mentioned ferritic strip steel, the specific process is as follows:

[0038] (1) Molten steel is poured into the crystallizer by ladle casting, and after being crystallized by the crystallizer, it is processed by a continuous casting machine at a casting speed of 5.2m / min to obtain a 125mm billet I;

[0039] (2) Casting slab I undergoes rough rolling and descaling treatment, cleans the surface oxide scale and mold slag, and then passes through the two-stand high-pressure rolling mill to obtain the intermediate slab I with a thickness of 8mm, and the temperature of the intermediate slab I is controlled at 1150 ℃; the rolling capacity of a single large-reduction rolling mill is 2000t, and the reduction ratio is 85%;

[0040] (3) After the i...

Embodiment 3

[0044] A ferritic steel strip, the ferritic steel strip contains the following components by weight percentage:

[0045] C 0.01%, Si 0.15%, Mn 0.10%, P 0.010%, S 0.007%, Nb+Ti+V=0.01%, balance iron.

[0046] The rolling process of the above-mentioned ferritic strip steel, the specific process is as follows:

[0047] (1) The molten steel is poured into the crystallizer through ladle casting, and after being crystallized by the crystallizer, it is processed by a continuous casting machine at a casting speed of 5.5m / min to obtain a 130mm billet I;

[0048] (2) Rough rolling and descaling treatment of casting slab I, cleaning the surface oxide scale and mold slag, and then passing through the two-stand high-pressure rolling mill to obtain the intermediate slab I with a thickness of 8mm, and the temperature of the intermediate slab I is controlled at 1300 ℃; the rolling capacity of a single large-reduction rolling mill is 3500t, and the reduction rate is 82%;

[0049](3) After th...

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Abstract

The invention provides a rolling process for low-energy-consumption headless ferrite strip steel production. The rolling process mainly comprises the steps of continuous rolling of a continuous casting machine, rough rolling phosphorus removal, two-rack rough rolling, swing shearing, pushing out of a stacking machine, finish rolling scale removal, five-rack finish rolling, laminar cooling and coiling of an underground coiling machine. In the rolling process, the condition that the hot resume of a thin plate continuous casting and rolling production line is low is fully utilized, the disadvantage is converted into the advantage, the surface quality and performance of strip steel are effectively improved, and the obtained strip steel can replace cold rolled steel for use.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to a rolling process for the production of low-energy consumption endless ferrite strip steel. Background technique [0002] Thin slab continuous casting and rolling device is one of the main equipments in steel production, and it is very important in strip steel production. The current thin slab is a cold-rolled product. The rolling process is: hot rolling-pickling-cold rolling-annealing. In this process, there is a disadvantage of high exhaust gas volume. In addition, the use of induction heating furnace in the rolling process , so that the cost of this type of thin slab is high, which is not conducive to the long-term production of the thin slab. [0003] In recent years, from a comprehensive perspective of cost and environmental protection, "replacing heat with cold" has been increasingly recognized at home and abroad. However, due to the limitations of tradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/24B21B45/00
CPCB21B1/24B21B45/004
Inventor 季伟斌陈传敬喻尧赵占山周宏宝韩翔宋俊岭杨伟张李鹏王庆
Owner RIZHAO STEEL HLDG GROUP