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A method for stable rolling of niobium-added wide-band steel sheet

A wide-band steel and thin material technology, applied in the direction of metal rolling, etc., can solve problems such as forward folding of the head, excessive tail flicking, reduced production efficiency, poor rolling stability, etc. The effect of improving production efficiency and rolling stability

Active Publication Date: 2020-11-20
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the 1580 line of a steel factory is producing niobium-added wide-band steel ≤ 3.0mm, the rolling stability is poor, and there are many accidents such as head bending and tail flicking, which greatly affect the smooth production and reduce production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: SAE1012M / 2.3mm*1263mm

[0025] 1) Heating system and tapping rhythm control method: Add niobium steel tapping rhythm according to the thickness specification of the finished product. When the niobium steel enters the soaking section, the soaking section time is 35 minutes, the alloy elements are fully homogenized, and the difference between furnaces is controlled. at ±30°C.

[0026] 2) RRT and FDT optimal control methods for rough rolling: rough rolling is controlled at 1060°C to 1065°C (the target value is 1070°C, 5-10°C lower than the target value), and the rolling temperature of finish rolling is controlled at the upper limit of 890°C , realize the "low temperature and less water rolling method" and improve production stability.

[0027] 3) Observe the shape of the rough rolling material to ensure that the side bending of the three furnaces is consistent, and the side bending of the head of the rough rolling incoming material is controlled within ±30mm. ...

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PUM

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Abstract

The invention discloses a stable rolling method of a niobium-added wide band steel thin material. The rolling method comprises the steps that (1) treatment in a soaking zone is carried out for 35 minto 40 min, and the tapping temperature difference among heating furnaces is controlled to be + / - 30 DEG C; (2) swinging cooling is carried out at the last pass of roughing, roughing discharge temperature RDT is controlled to be at medium and lower limits of a target range, cooling water is not added among racks after finish rolling F4, and FDT is controlled to be 875 DEG C to 890 DEG C through maintaining the speed of a finishing mill; (3) side bend of a roughing feeding head is controlled to be within + / - 30 mm; and (4) convexity of a finished product is controlled: convexity of upstream racks is controlled to be 50 <mu>m to 60 <mu>m. The stable rolling method has the beneficial effects that the stable rolling method of the niobium-added wide band steel thin material is used for producingniobium-added wide band steel of which the thickness is smaller than or equal to 3.0 mm, the rolling success rate of niobium-added wide band steel is increased, the occurrence rate of folding and drift production accidents is decreased, the operation rate of a rolling machine is increased, the yield is increased, and profit growth is achieved.

Description

technical field [0001] The invention belongs to the field of hot strip steel production, and in particular relates to a method for stably rolling a niobium-added wide strip steel sheet. Background technique [0002] When the 1580 line of a steel plant produced niobium-added wide-band steel ≤ 3.0mm, the rolling stability was poor, and there were many accidents such as head bending and tail flicking, which greatly affected the smooth production and reduced production efficiency. Contents of the invention [0003] The invention provides a method for stable rolling of niobium-added wide-band steel thin material, which is used for producing niobium-added wide-band steel of ≤3.0mm, improving the rolling success rate of niobium-added wide-band steel, and reducing production accidents such as folding and flicking The occurrence rate of the rolling mill can be improved to increase the operating rate of the rolling mill, thereby increasing the output and realizing profit growth. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/26B21B3/00C22C38/02C22C38/04C22C38/06C22C38/12
CPCB21B1/26B21B3/00C22C38/02C22C38/04C22C38/06C22C38/12
Inventor 李春亮李江委贺亮范细忠何士国付青才王存马振伟
Owner ANGANG STEEL CO LTD