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Hot rolled plate shape improving method

A hot-rolled plate and plate shape technology, applied in metal rolling, metal rolling, workpiece surface treatment equipment, etc., to achieve the effect of improving plate shape, solving camber, and reducing the probability of camber

Inactive Publication Date: 2018-02-16
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of sickle bending of the existing hot-rolled sheet, the present invention provides a method for improving the shape of the hot-rolled sheet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] P590L high-strength hot-rolled steel plate for automobile frame, specification 10.0×1260mm (thickness×width), coiling temperature 630℃, direct air cooling, camber range 3.8mm / 10m~8.0mm / 10m.

[0013] It is adopted to enter the pit 35 minutes after coiling, and the number of rolls entering the pit at the same time is 48 rolls, and the time in the pit is 82 hours.

Embodiment 2

[0015] P700L high-strength hot-rolled steel plate for automobile frame, specification is 8.0×1660mm (thickness×width), coiling temperature is 590℃, direct air cooling, camber range is 5.2mm / 10m~14.0mm / 10m.

[0016] It is adopted to enter the pit 47 minutes after coiling, and the number of coils entering the pit at the same time is 36 rolls, and the time in the pit is 96 hours. The range of the camber is 1.0mm / 10m~2.0mm / 10m.

Embodiment 3

[0018] P600CX high-strength automotive structural hot-rolled steel plate, specification is 6.0×1300mm (thickness×width), coiling temperature is 610°C, direct air cooling, camber range is 3.8mm / 10m~6.2mm / 10m.

[0019] It is adopted to enter the pit 57 minutes after coiling, and the number of rolls entering the pit at the same time is 42 rolls, and the time in the pit is 73 hours.

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PUM

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Abstract

The invention belongs to the technical field of hot continuously rolled plate and strip production and particularly relates to a technique for solving the problem of cambers of hot rolled plates. In order to solve the technical problem, a hot rolled plate shape improving method is provided and includes that a coiled steel billet is put into a slow cooling pit for slow cooling within 60min. By adoption of the slow cooling pit for production of hot rolled steel coils, cambers are smaller than 2.0mm / 10m in use. By adoption of the method, probability of camber occurrence in a utilization process of steel plates is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled strip production, and in particular relates to a technology for solving the camber problem of hot-rolled strips. Background technique [0002] The "sickle" shape of hot-rolled strip is a major factor affecting the quality of the shape, and it is also a common shape defect. Hot-rolled strip steel will generate internal stress during rolling and cooling, and these internal stresses will be released during use, resulting in a "sickle". [0003] Most of the steel mills solve the camber problem by controlling the process during the rolling process. For example, a control method (CN201510287504.0) for adjusting the "sickle" shape at the exit of a finishing mill is to use a control system device consisting of a hot metal flatness detection system and a finishing mill hydraulic control system. The shape of the strip 1 after F7 frame) 2 rolling is tested for "sickle" to ensure that the strip shape at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/26B21B45/02
CPCB21B1/26B21B45/02
Inventor 叶晓瑜刘勇熊雪刚张开华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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