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Medium-size back plate punching distortion resisting galvanized steel and manufacturing method thereof

A technology of anti-stamping and galvanized steel, which is applied in the field of improving the distortion of the steel plate stamping process. It can solve the problems of distortion and material yield strength that cannot meet the requirements of improving the stamping distortion. The uniformity of the material’s transverse properties, etc., achieves a large process window and industrial realization Easy, productive results

Active Publication Date: 2017-01-11
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to study a method suitable for 22-29 inch medium-size galvanized liquid crystal backplane products so that the steel plate does not twist after stamping. Distorted technical issues
In order to solve the problem of medium-sized distortion, it is necessary to solve the problem that the yield strength of the current material cannot meet the requirements of improving the stamping distortion and the uniformity of the transverse properties of the material

Method used

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  • Medium-size back plate punching distortion resisting galvanized steel and manufacturing method thereof
  • Medium-size back plate punching distortion resisting galvanized steel and manufacturing method thereof
  • Medium-size back plate punching distortion resisting galvanized steel and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0032]Example 1 and Comparative Example 3 respectively compared the effects of adding boron and low manganese content on the yield strength of the finished product. Through comparison, it was found that the yield strength of adding 0.0020% boron was 216MPa, and no distortion occurred after stamping, while the yield strength of no boron was added It is 260MPa, twisted after stamping, and the addition of boron element in the element is beneficial to reduce the yield strength of the steel plate. image 3 The uniformity distribution diagram of the plate width longitudinal yield strength of Example 1 is shown.

Embodiment 2

[0033] The comparison between Example 2 and Comparative Example 1 shows that the addition of boron element affects the uniformity of material performance. Through comparison, it is found that the addition of 0.0015% boron element Example 1 has a yield range of 5MPa, and no distortion occurs after stamping, while the comparative example without adding boron element 1 The yield difference is 15MPa, and as a result, distortion occurs after stamping. Figure 4 The distribution diagram of the uniformity distribution of the plate width longitudinal yield strength of Comparative Example 1 is shown.

[0034] Example 4 and Comparative Example 2 respectively compared the influence of different carbon contents on the yield strength of the finished product. By comparison, it was found that the yield strength of the added 0.014% carbon element was 200MPa, and no distortion occurred after stamping, while the yield strength of the added 0.04% carbon element was 265MPa. Distortion occurs afte...

Embodiment 7

[0036] Example 7 and Comparative Example 5 compared the influence of the change of coiling temperature on the uniformity of material properties. Through comparison, it was found that the yield strength of Example 7 was 205 MPa when the coiling temperature was 746 °C, and no distortion occurred after stamping, while the coiling temperature was 600 °C. In Example 5, the yield strength was 245 MPa, and as a result, distortion occurred after stamping.

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Abstract

The invention relates to medium-size back plate punching distortion resisting galvanized steel and a manufacturing method thereof, and mains solves the technical problem of generation of distortion of 22-29-inch liquid crystal back plate modules in the punching process. In order to achieve the purpose, a substrate comprises the following chemical components (weight percentage): 0.010-0.019% of C, 0.01-0.03% of Si, 0.05-0.09% of Mn, 0.01-0.06% of Al, P not more than 0.015%, S not more than 0.010%, 0.0010-0.0020% of B, and the balance of Fe and inevitable impurity elements. A plate blank is rolled after heating; the final rolling temperature is 850-900 DEG C; the coiling temperature is 730-750 DEG C; a hot-rolled steel plate is obtained through rolling; the hot-rolled plate is coldly rolled on a reversible rolling or five-frame cold continuous rolling mill after uncoiling and acid washing, and is annealed by an annealing furnace; the soaking temperature is 800-850 DEG C; the soaking time is 30-40 seconds; and a final product is obtained. The medium-size back plate punching distortion resisting galvanized steel is suitable for 0.5-0.6 mm galvanized steel plates for punching liquid crystal back plate modules.

Description

technical field [0001] The invention relates to a method for solving the distortion in the stamping process of a 22-29-inch LCD backplane module. By analyzing the material characteristics that affect the distortion in the stamping process, a method for improving the distortion in the stamping process of the steel plate is found, which is suitable for liquid crystal backplanes 0.5-0.6mm galvanized steel sheet for die stamping. Background technique [0002] With the improvement of people's living standards, more and more electronic display screens use liquid crystal display, and the size of liquid crystal display screens is getting larger and larger. According to the size of the liquid crystal screen, it can be divided into three categories, one is less than 21 inches The small-size LCD screen of the first category, the medium-size LCD screen of 22-29 inches for the second category, and the large-size LCD screen of 32-49 inches for the third category. The component used to su...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C33/04
Inventor 丁志龙范建冬孙磊顾云
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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