Plate shape control method of hot-rolling and coiled-rolling steel plate of single-rack steekle mill

A furnace coil rolling mill and steel plate shape technology, which is applied in the field of steel rolling, can solve the problems of excessive temperature drop, uneven temperature distribution, and excessive temperature difference of the rolled piece, so as to improve the primary rolling rate, increase production capacity and efficiency, and speed up The effect of production rhythm

Active Publication Date: 2012-10-03
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since the rolled piece is too long in the finishing rolling stage, during the rolling process, as the steel plate becomes thinner and longer, the temperature of the steel plate will drop faster and faster, especially at the rolling head. The temperature drop is faster, resulting in extremely uneven temperature distribution along the length of the rolled piece, which increases the difficulty o

Method used

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  • Plate shape control method of hot-rolling and coiled-rolling steel plate of single-rack steekle mill
  • Plate shape control method of hot-rolling and coiled-rolling steel plate of single-rack steekle mill

Examples

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Example Embodiment

[0024] Example 1

[0025] This embodiment is a single-stand Steckel mill hot-rolling X65 pipeline steel strip shape control process. The process requires a furnace temperature of 1200°C, a billet heating temperature: the head is 1220°C, the intermediate heating temperature is 1200°C, and the tail The heating temperature is 1235°C. The rolling pass is 4+7, the initial rolling temperature is 960℃, and the thickness of the billet to be warmed is 5.6h. The seventh to tenth passes are coil rolling, the coil rolling tension is 24 tons, and the temperature of the coiling furnace rises to 900°C. The reduction rate of the 10th pass is 17%, and the reduction rate of the 11th pass is 11%; the bending force from the 6th pass to the 10th pass is 990 tons, 950 tons, 840 tons, 770 tons, and 590 tons. . The final rolling speed is 1.60m / s; after the work roll has produced more than 900 tons, turn on the cooling water around the work roll; such as the width of the rolled piece> 3m, the edge of...

Example Embodiment

[0033] Example 2

[0034] This embodiment is a single-stand Steckel mill hot-rolling X70 pipeline steel strip shape control process. The process requires a furnace temperature of 1200°C, a billet heating temperature: the head is 1225°C, the intermediate heating temperature is 1200°C, and the tail The heating temperature is 1240°C. The rolling pass is 4+7, the initial rolling temperature is 960℃, and the thickness of the billet is 4h. The 7th to 10th passes are coil rolling, the coil rolling tension is 28 tons, and the temperature of the coiling furnace rises to 950°C. The reduction rate of the 10th pass is 17%, and the reduction rate of the 11th pass is 11%; the bending force from the 6th pass to the 10th pass is 980 tons, 940 tons, 860 tons, 790 tons, and 580 tons. . The final rolling speed is 1.55m / s; after the work roll has produced more than 800 tons, turn on the cooling water around the work roll; such as the width of the rolled piece> 3m, the edge of the cooling system...

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Abstract

The invention belongs to the field of steel rolling and discloses a plate shape control method of a hot-rolling and curved-rolling steel plate of a single-rack steekle mill. The plate shape control technology of the hot-rolling and curved-rolling steel plate of the single-rack steekle mill is realized by the steps of adjusting a heating system, optimizing temperature setting of a coiler furnace, adjusting coiled-rolling tension force of the coiler furnace, optimizing a down-pressing system, utilization of bending rolling force of a milling machine and a straightening machine as well as a roller convex degree of a working roller, improving temperature of cooling water which keeps a thin coiled-rolling plate, using an edge shielding function of a laminar flow cooling system, comprehensively adjusting straightening process of edge rollers and bending rollers of a hot straightening machine and the like. When a long billet with a thickness of 150 mm to 220 mm and a steel plate with a rolling thickness not greater than 12 mm are used, the plate shape control method disclosed by the invention has the advantages of synthetically controlling plate shape of the coiled-rolling steel plate and optimizing mechanical properties of the coiled-rolling plate.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a method for controlling the shape of a steel plate, in particular to a method for controlling the shape of a hot-rolled coiled steel plate in a single-stand furnace coil mill. Background technique [0002] At present, when using 150mm ~ 220mm thick billet rolling to produce thin gauge (thickness ≤ 12mm) steel plate, the performance and shape need to be controlled at the same time. If the billet with a rolling length of more than 10m is rolled, the thickness of the final rolled piece is ≤12mm, the length is ≥150m, and the longest can reach more than 250m. [0003] Since the rolled piece is too long in the finishing rolling stage, during the rolling process, as the steel plate becomes thinner and longer, the temperature of the steel plate will drop faster and faster, especially at the rolling head. At the end, the temperature drop is faster, resulting in extremely uneven temperature di...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B37/58B21B37/74B21B15/00
Inventor 赵显鹏王道远刘春王凡刘冰
Owner NANJING IRON & STEEL CO LTD
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