Cold-rolling hot-dipping steel plate used for liquid-crystal module backboard and production method of the steel plate

A technology of liquid crystal module and production method, which is applied in the field of cold-rolled hot-dipped steel plate and its production, can solve the problems of distortion, drumming, cracking, etc., achieve good plate shape, excellent stamping performance, and meet the stamping and forming manufacturing requirements Effect

Active Publication Date: 2014-04-02
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 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

Method used

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  • Cold-rolling hot-dipping steel plate used for liquid-crystal module backboard and production method of the steel plate
  • Cold-rolling hot-dipping steel plate used for liquid-crystal module backboard and production method of the steel plate
  • Cold-rolling hot-dipping steel plate used for liquid-crystal module backboard and production method of the steel plate

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Embodiment Construction

[0040] 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.

[0041]

[0042] element C Si mn P S Alt this invention 0.045~0.085 0~0.05 0.1~0.4 ≤0.015 ≤0.015 0.025~0.065 Example 1 0.0518 0.0072 0.322 0.0166 0.0139 0.0258 Example 2 0.0669 0.0149 0.303 0.0128 0.0102 0.0257 Example 3 0.0811 0.011 0.305 0.0116 0.006 0.0367 Comparative example 1 0.037 0.009 0.149 0.013 0.01 0.067 Comparative example 2 0.034 0.01 0.152 0.013 0.011 0.065

[0043] 。[0026] 。

[0044]

[0045] 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 th...

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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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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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