Manufacturing method of secondary-cold-rolling shadow mask strip steel in thin specification

A technology of secondary cold rolling and manufacturing method, which is applied in the field of manufacturing ultra-low carbon thin-gauge shadow mask strip steel, which can solve the problems of high continuous annealing temperature and increased defects of strip steel materials, so as to reduce continuous annealing temperature and reduce fracture The effect of bringing probability and shortening the production process

Inactive Publication Date: 2014-01-15
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since this patent adopts the production method of Nb and Ti composite carbon fixation, in order to ensure complete decarburization to obtain good anti-aging performance, it requir

Method used

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  • Manufacturing method of secondary-cold-rolling shadow mask strip steel in thin specification
  • Manufacturing method of secondary-cold-rolling shadow mask strip steel in thin specification
  • Manufacturing method of secondary-cold-rolling shadow mask strip steel in thin specification

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Experimental program
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Effect test

specific Embodiment 1-10

[0048] Table one embodiment chemical composition (mass percentage composition, wt%)

[0049]

[0050] Table 2 Hot rolling, cold rolling and continuous annealing process parameters

[0051]

[0052] Table 3 Processing parameters of secondary cold rolling process

[0053]

[0054] Table 4 Performance parameters of secondary cold-rolled shadow mask strip products

[0055]

[0056] According to the results of 1-10 specific examples, it can be seen that the qualified product is finally obtained, the thickness is about 0.15mm, the yield strength is 412~498Mpa, the tensile strength is 514~581Mpa, the elongation is 3~7%, and the strip material surface roughness Ra is 0.38~0.62μm, Rz is 2.55~2.82μm, Rsm is 84.4~105.7μm, Rsk is 0.76~1.03, HV is 148~178, all waves are less than 2.8mm. It can be seen that the various properties and surface quality parameters of the product obtained by the present invention can well meet the requirements of subsequent processing procedures su...

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Abstract

The invention discloses a manufacturing method of secondary-cold-rolling shadow mask strip steel in a thin specification. The manufacturing method comprises the following steps of: carrying out converter steelmaking; carrying out continuous billet casting; carrying out acid washing and cold rolling; preparing a machine set; carrying out continuous annealing; carrying out secondary cold-rolling; degreasing; and finishing and oiling. The mass percentage of each element is controlled in a corresponding range, wherein the mass percentage of C element is controlled to be less than or equal to 0.002%; the plate temperature is 685-705 DEG C and the soaking time lasts for 30-50 seconds in a heating section and a soaking section of the continuous annealing step; and the rolling reduction of secondary cold rolling is 20%-50%. By using the manufacturing method, a shadow mask strip steel product having ultra-low carbon, an thickness of less than or equal to 0.15 mm and better surface quality and use property can be obtained; as a secondary cold rolling process is adopted, the strength and the rigidity of an annealed product can be improved, decarburization and annealing steps can be omitted, the production flow can be shortened, the production cost can be reduced and the energy consumption and the waste discharge can be reduced.

Description

technical field [0001] The invention relates to a method for manufacturing thin-gauge shadow mask strip steel, in particular to a manufacturing method for ultra-low carbon thin-gauge shadow mask strip steel. Background technique [0002] At present, the production method of cold-rolled thin steel sheets for shadow mask materials is: final hot-rolling of ultra-low carbon steel manufactured by steel factories, the final rolling temperature can be higher or lower than the Ar3 transformation point, and then pickled 1. After cold rolling to the specified thickness and degreasing treatment, decarburization annealing is carried out to reduce the carbon content to below 0.0008%, and the secondary cold rolling is carried out at a reduction of 50% or higher to the required thickness of the final product. Due to the traditional process method, high-temperature decarburization annealing process is required between the secondary cold rolling, and most of them use small-scale Sendzimir ro...

Claims

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Application Information

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IPC IPC(8): C22C38/28C21D8/02
Inventor 李俊王健李秀军吴首民
Owner BAOSHAN IRON & STEEL CO LTD
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