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Production method of ultra-deep drawing grade steel

A production method and deep-drawing technology, applied in the field of steel rolling, can solve the problems of unseen SEDDQ steel, and achieve the effects of qualified and stable performance, improved yield and good direct economic benefits.

Active Publication Date: 2020-01-21
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no effective production control process and technical scheme for the cold rolling process that can stably produce SEDDQ steel with a width greater than or equal to 1500mm at home and abroad.

Method used

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  • Production method of ultra-deep drawing grade steel
  • Production method of ultra-deep drawing grade steel
  • Production method of ultra-deep drawing grade steel

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Embodiment Construction

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the following embodiments do not limit the present invention, and combinations and substitutions can be made between different embodiments.

[0021] like figure 1 As shown, an embodiment of the present invention provides a method for producing ultra-extra deep-drawing grade steel, which includes: shearing the head and tail of the strip; the sheared strip enters the continuous annealing unit, and the strip is controlled to pass through in sequence The heating section, soaking section, slow cooling section, rapid cooling section, overaging section and final cooling section of the continuous annealing unit; among them, when the width of the strip is greater than 1500mm and less than 1850mm, the temperature of the soaking section is controlled to be 830 -850℃, the temperature of the slow cooling section is controlled to be 640-660℃...

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Abstract

The invention provides a production method of SEDDQ steel. The production method comprises the steps that a strip head and a strip tail of strip steel are cut; the cut strip steel enters a continuousannealing unit, and the strip steel is controlled to sequentially pass through a heating section, an even heating section, a slow cooling section, a quick cooling section, an overaging section and a final cooling section of the continuous annealing unit in sequence, wherein when the width of the strip steel is larger than 1500 mm and smaller than 1850 mm, the temperature of the even heating section is controlled to range from 830 DEG C to 850 DEG C, the temperature of the slow cooling section is controlled to range from 640 DEG C to 660 DEG C, the temperature of the quick cooling section is controlled to range from 440 DEG C to 460 DEG C, and the temperature of the overaging section is controlled to range from 370 DEG C to 430 DEG C; and when the width of the slow cooling section is largerthan or equal to 1850 mm, the temperature of the even heating section is controlled to range from 820 DEG C to 840 DEG C, the temperature of the slow cooling section is controlled to range from 600 DEG C to 630 DEG C, the temperature of the quick cooling section is controlled to range from 350 DEG C to 400 DEG C, and the temperature of the overaging section is controlled to range from 330 DEG C to 370 DEG C. The production method aims at producing the SEDDQ steel with the width larger than 1500 mm.

Description

technical field [0001] The invention relates to the technical field of steel rolling, and more particularly, to a method for producing ultra-extra deep-drawing grade steel. Background technique [0002] With the development of the automobile market, the amount of steel used in automobiles has grown synchronously. In the current situation of fierce market competition, the way to win is to develop "one wide and three high" products, that is, wide-width boards, high added value, high surface grade, and high deep-drawing products, improve product quality, and improve product comprehensive competitiveness. . [0003] The development of the automobile industry, the improvement of automobile manufacturing in the direction of structure, the development of formed parts towards the direction of integral forming, that is, the combination of multiple parts and components, which simplifies the assembly of the entire automobile, improves the overall performance, and also increases the sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/56C21D1/26C21D11/00
CPCC21D1/26C21D9/56C21D11/00C21D11/005
Inventor 周文强潘利波田德新杜小峰孙方义胡建旺
Owner 武汉钢铁有限公司
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