Hot-dip galvanized steel sheet for large-size liquid crystal display backplane and manufacturing method thereof

Abstract

The invention relates to a hot-dip-galvanized steel plate for large-size liquid crystal display back plates and a manufacturing method of the hot-dip-galvanized steel plate and mainly solves the technical problems of bulging and warping in the processes that 32-55-inch liquid crystal display back plates are formed through stamping machining of existing hot-dip-galvanized steel plates. A base plateof the hot-dip-galvanized steel plate for the large-size liquid crystal display back plates is prepared from chemical components in percentage by weight as follows: 0.0005%-0.0009% of C, 0-0.03% of Si, 0.05%-0.12% of Mn, 0.02%-0.04% of Ti, 0.0005%-0.0009% of Nb, less than or equal to 0.0030% of N, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.0002%-0.0004% of B and the balance of Fe and inevitable inclusion elements. The hot-dip-galvanized steel plate meets the stamping machining requirements of the 32-55-inch liquid crystal display back plates.

Description

technical field [0001] The invention relates to a hot-dip galvanized steel sheet, in particular to a hot-dip galvanized steel sheet for a large-size liquid crystal display backplane and a manufacturing method thereof, in particular to a hot-dip galvanized steel sheet for manufacturing a 32-55 inch liquid crystal display backplane A steel plate belongs to the technical field of iron-based alloys. Background technique [0002] With the development of science and technology and the improvement of family living standards, LCD screen technology is gradually scaled up. Since 2009, liquid crystal displays have experienced explosive growth, accounting for more than 70% of the global display market. The original CRT displays have gradually withdrawn from the market, and the demand for steel for liquid crystal modules has increased significantly. [0003] In 2013, with the development of large-size LCD screen technology, more and more steel for LCD modules turned to galvanized produc...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a hot-dip galvanized steel sheet for a large-size liquid crystal display backplane and its manufacturing method, which mainly solves the technology of drumming and twisting in the stamping process of a 32-55-inch liquid crystal display backplane with an existing hot-dip galvanized steel sheet Problem, the hot-dip galvanized steel sheet of the present invention meets the manufacturing requirements of large-size liquid crystal display backplanes, and no drumming and distortion will occur after stamping

[0007] The present invention focuses on the realization of the ultra-low yield strength of the galvanized sheet, the uniformity of the yield strength in the width direction of the sheet, and the difference in the transverse and longitudinal yield strength of the steel sheet

[0008] In order to solve the technical problem of drumming and twisting after stamping, it is necessary to solve the problem that the yield strength of the hot-dip galvanized steel sheet cannot meet the requirements for improving the stamping and drumming distortion and the uniformity of the material's transverse and longitudinal properties

Images