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Method for controlling swelling rib in central section of color coating base material

A control method and base material technology, which can be used in coatings, manufacturing tools, metal material coating processes, etc., can solve the problems of high precision control of cross-sectional profiles of strips, and improve the yield and product surface quality. Easy, Difficulty-Reducing Effect

Inactive Publication Date: 2011-10-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited capacity of hot rolling mill equipment, the complex and harsh working environment of the rolling process, and the randomness of process conditions and state fluctuations in the large-scale production process, it is impossible to control the accuracy of the cross-sectional profile of the strip to a high level (such as theoretical It is best to control the local high depressions of hot rolling within 10μm to eliminate the impact on downstream processes)

Method used

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  • Method for controlling swelling rib in central section of color coating base material
  • Method for controlling swelling rib in central section of color coating base material
  • Method for controlling swelling rib in central section of color coating base material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] During mass production of 0.45mm*1250mm color-coated base materials, the phenomenon of the first coiled ribs is more serious in the galvanizing and coiling process. The yield strength of the quick sample of galvanized strip steel production is 224MPa, and the RTF furnace temperature at this time is 695°C, the annealing speed is 110m / min, and the unit coiling tension is 32N / mm 2 , adjust the annealing temperature to 675°C, increase the annealing speed to 125 m / min, and the yield strength rises to 264MPa after testing; at the same time, the unit coiling tension drops to 24N / mm 2. When the batch of remaining rolls was produced with this process parameter configuration, it was found that the phenomenon of ribbing disappeared after coiling.

Embodiment 2

[0037] When batch production of 1.00mm*1250mm color-coated base material, the phenomenon of the first coiling ribs is more serious in the galvanizing and coiling process. The yield strength of the quick sample of galvanized strip steel production is 220MPa, and the RTF furnace temperature at this time is 700℃, the annealing speed is 100m / min, and the unit coiling tension is 18N / mm 2 After debugging, the annealing temperature was reduced to 680°C, the annealing speed was increased to 125 m / min, and the yield strength was detected to be 258MPa; at the same time, the unit coiling tension was reduced to 15N / mm 2 . When the batch of remaining rolls was produced with this process parameter configuration, it was found that the phenomenon of ribbing disappeared after coiling.

Embodiment 3

[0039] When batch production of 0.50mm*1250mm color-coated base material, the phenomenon of the first coiling ribs is more serious in the galvanizing and coiling process. 698℃, the annealing speed is 125m / min, and the unit coiling tension is 29N / mm 2 After debugging, the annealing temperature was lowered to 668°C, the annealing speed remained unchanged, and the yield strength rose to 270MPa after testing; at the same time, the unit coiling tension dropped to 22N / mm 2 . When the batch of remaining rolls was produced with this process parameter configuration, it was found that the phenomenon of ribbing disappeared after coiling.

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Abstract

The invention relates to a method for controlling swelling ribs in the central section of a color coating base material. According to the method, under the prerequisite condition of no changes to the existing production equipment, annealing temperature of a galvanizing unit is set at 660 to 790 DEG C and annealing speed is set to be over 60% of the maximum speed capability of the galvanizing unit for strip steel with a thickness of 0.3 mm to 2.0 mm so as to make yield strength of galvanized strip steel reach 250 MPa to 340 MPa; simultaneously, unit coiling tension is set to be 9 to 34 N / mm<2>. The beneficial effects of the invention are as follows: the problem of swelling ribs in the central section of a color coating base material is effectively solved; rolling yield of color coating products and quality of surfaces of the products are improved; return rate of color coating base materials due to swelling ribs in the central section thereof is obviously decreased; after fault tolerance of downstream units is enhanced, requirements for the hot rolling raw material strip steel in its performance across the width and shape are lowered down, thereby reducing the difficulty in hot rolling production and producing good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of processing engineering and relates to a method for controlling ribbing in the middle of a color-coated base material. Background technique [0002] At present, color-coated sheet and strip steel has been widely used in automobile manufacturing, home appliance industry and construction industry. Its production process is complicated, involving multiple processes such as steelmaking, continuous casting, hot rolling, cold rolling, annealing, galvanizing, skin finishing and coating. In recent years, as users have higher and higher requirements for the quality and performance of coated products, coupled with changes in the process and equipment conditions of each process, the quality of the plate shape in the production of coated products and the resulting production problems have gradually Exposure, especially the production of color-coated sheets, the problem is more prominent. The shape of the color-coated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/52C21D1/26B21C47/02C23C2/06
Inventor 何安瑞管长林邵健朱涛郭德福刘茂林孙文权陈胜利
Owner UNIV OF SCI & TECH BEIJING