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A cold-rolled hot-dipped steel strip for liquid crystal module backplane and production method thereof

Technology of a liquid crystal module and production method

Active Publication Date: 2016-01-20
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a hot-dip plated steel plate for liquid crystal module back plate and its production method, to solve the problem of the hot-dip plated steel plate produced by the existing low-carbon aluminum killed steel in stamping for the liquid crystal module back plate Technical problems of cracking, drumming, and distortion during the forming process

Method used

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  • A cold-rolled hot-dipped steel strip for liquid crystal module backplane and production method thereof
  • A cold-rolled hot-dipped steel strip for liquid crystal module backplane and production method thereof
  • A cold-rolled hot-dipped steel strip for liquid crystal module backplane and production method thereof

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Embodiment Construction

[0037] The product grade selected for this implementation is DC51D+AZ, and the specification is 0.6mm*1250mm. The present invention will be further described below in conjunction with Examples 1~3 and Comparative Examples 1~2, as shown in Table 1~Table 9.

[0038] Table 1 Chemical composition of the present invention (% by weight), the balance is Fe and unavoidable impurities.

[0039]

[0040] Continuous casting slabs meeting the required chemical composition are obtained through converter smelting, with a thickness of 210-240 mm, a width of 800-1300 mm, and a length of 5000-10000 mm. The cut-to-length slab is sent to the heating furnace for reheating, and after being released from the furnace for dephosphorization, it is sent to the continuous hot rolling mill for rolling. After the rolling is controlled by the rough rolling mill and the finishing tandem rolling unit, coiling is carried out, and qualified hot-rolled steel coils are produced. The process control of hot ...

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Abstract

The invention relates to a cold-rolling hot-dipping steel plate used for a liquid-crystal module backboard and a production method of the steel plate, and solves technical problems of cracking and deformation of hot-dipping steel plates produced from low carbon aluminum killed steel when the hot-dipping steel plates are used in stamping forming processes of liquid-crystal module backboards. The production method includes sequential steps of smelting according to components, desulfurizing molten iron, performing combined top-bottom blowing in a converter, blowing bottom argon to a steel ladle or refining in an LF furnace, casting low-carbon steel casting powder while blowing Ar for protection, heating slabs by a heating furnace, descaling, performing rough rolling, performing precision rolling, coiling to obtain hot rolled steel coils, uncoiling again, washing with an acid, performing cold rolling, annealing by a horizontal continuous annealing furnace, performing hot dipping, flattening, withdrawing and straightening and coiling to obtain a finished product. The finish rolling temperature of the precision rolling is 860-900 DEG C. The coiling temperature is 580-650 DEG C. The cold-rolling reduction ratio is 78-85%. The temperature of cold-rolled strip steel in hard state in the soaking section of the horizontal continuous annealing furnace ranges from 730 DEG C to 770 DEG C. The heating time of the strip steel in the horizontal continuous annealing furnace is 80-100 s. The flatness rate after the hot dipping step is 0.6%-1.2% and the withdrawing and straightening rate is 0.3-0.8%. The steel plate is mainly used for the liquid-crystal module backboard of liquid-crystal and flat-panel displays.

Description

technical field [0001] The invention relates to a cold-rolled hot-dip-coated steel plate and a production method thereof, in particular to a cold-rolled hot-dip-coated steel plate used for a liquid crystal module back plate and a production method thereof. Background technique [0002] In the liquid crystal display and flat-panel TV industry, the new generation of LCD and LED production technologies are maturing and accepted by the market. The amount of material used in the backplane of liquid crystal modules for flat panel displays is increasing. Based on the precise structure of the liquid crystal module and the need for heat dissipation, its backplane products have high requirements on the material surface, shape, dimensional tolerance and mechanical properties, and the production cost is high; the existing technology mainly uses aluminum alloy plates and electro-galvanized steel plates . The production cost of aluminum alloy sheets and electro-galvanized steel sheets i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C21D8/02
Inventor 王银军胡恒法耿灿
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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