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Rolling method for reducing edge cracking of continuous rolling mill

A continuous rolling mill and continuous rolling technology, applied in the field of strip rolling, can solve problems such as broken strips

Inactive Publication Date: 2018-04-13
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a rolling method for reducing edge cracks in a continuous rolling mill to solve the technical problem of strip breakage during the rolling process

Method used

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  • Rolling method for reducing edge cracking of continuous rolling mill
  • Rolling method for reducing edge cracking of continuous rolling mill

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Embodiment Construction

[0017] In order to make those skilled in the technical field of the application understand the application more clearly, the technical solution of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0018] In the present invention, a rolling method for reducing side cracks in a continuous rolling mill is disclosed. By inputting the specific value of the roll gap variation, the method of increasing the thickness of the weld seam and reducing the rolling force in the weld seam area is disclosed, thereby avoiding the If it is too thin and the rolling force is too large, the edge cracks and the belt breakage accident will occur, so as to ensure the smooth progress of rolling. By adjusting the low-speed additional tension value of the rolling mill, the tensile stress in the weld area is reduced, thereby avoiding or reducing edge cracks, and preventing the edge cracks in the front and rear areas of the weld f...

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Abstract

The invention discloses a rolling method for reducing edge cracking of a continuous rolling mill. When a weld joint of a strip steel reaches the preset distance of all the racks of the continuous rolling unit, the lifting amount of a roller gap of each machine frame is controlled and enables the roller gap of the strip steel to enter into each machine frame, so the way of increasing the thicknessof the welding seam and reducing the rolling force of the welding seam area is achieved, edge split and strip breakage accidents caused by ultra-thin strip heads and excessively large rolling force can be avoided, and the smooth rolling is guaranteed. The additional tension value of each machine frame is increased, then the set tension value of each machine frame is obtained, the strip steel is rolled according to the set tension value, so that the tensile stress of the welding seam area is reduced, edge split can be avoided or reduced, so that the phenomenon of strip breakage caused by edge split of the front region and the rear region of the weld joint is avoided, and free rolling of the rolling mill is facilitated.

Description

technical field [0001] The present application relates to the technical field of strip rolling, in particular to a rolling method for reducing side cracks in a continuous rolling mill. Background technique [0002] High-strength steel is a high-end market variety in the field of cold-rolled sheets, featuring high added value, high yield strength, and high tensile strength. Whoever can guarantee stable and efficient production and overcome the difficulty of producing high value-added steel varieties means that they have seized the opportunity and occupied the market. [0003] During the development of high-strength steel, the addition of alloy elements to high-strength steel causes changes in composition and structure, resulting in high brittleness of the material in the cold rolling process, which easily causes edge cracks in the weld area of ​​the rolling mill, and causes fractures during the rolling process. Belt, every time the production is affected for 1 hour, which se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/28B21B37/58B21B37/48
CPCB21B1/28B21B37/48B21B37/58
Inventor 齐海峰王少飞王飞任新意杨洪凯窦爱民刘鸿明王智锋张树亮胡开艳宁媛媛
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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