High-strength steel rolling method and device

A high-strength steel and rolling force technology, applied in the field of high-strength steel rolling methods and devices

Active Publication Date: 2020-01-24
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a high-strength steel rolling method and device, which is used to solve the problem th

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  • High-strength steel rolling method and device
  • High-strength steel rolling method and device

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Embodiment 1

[0042] This embodiment provides a rolling method for high-strength steel, which is applied to a tandem cold rolling mill, and the tandem cold rolling mill includes: a first stand, a second stand, a third stand, a fourth stand and a fifth stand frame; such as figure 1 As shown, the method includes:

[0043] S110, during the rolling process, control the reduction ratio of the first stand to 15-25%, the rolling force to 23929-26448kn, the speed to 79-81mpm, the forward slip to -0.959-3.041, and the tension to 180.5 ~199.5Mpa;

[0044] It is necessary to start the machine before normal rolling. When starting the machine, the feedback thickness AGC control strategy for controlling the fourth stand and the fifth stand is closed. And use the raw material plate mode to start the car to ensure that the strip speed is 45mpm when the fifth rack exits after the car is started.

[0045] When starting the car, it is also necessary to control the reduction rate of the fifth stand to 90% o...

Embodiment 2

[0070] Corresponding to Embodiment 1, this embodiment also provides a rolling device for high-strength steel, such as figure 2 As shown, the device includes: a first control unit 21, a second control unit 22, a third control unit 23, a fourth control unit 24, and a fifth control unit 25;

[0071] It is necessary to start the car before normal rolling. When starting the car, the fourth control unit 24 is used to control the feedback thickness AGC control strategy of the fourth stand to be closed, and the fifth control unit 25 is used to control the AGC when starting the car. The feedback thickness AGC control strategy of the fifth rack is closed, and the raw material plate mode is used to start the car, so that after the car is started, the strip speed at the exit of the fifth rack after the car is controlled to be 45mpm. At this time, because the fifth stand uses the roll gap adjustment method to adjust the tension of the fifth stand, in order to avoid the impact of the roll ...

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Abstract

An embodiment of the invention provides a high-strength steel rolling method and device. The method comprises the steps of controlling the reduction ratio of a first rack to be 15% to 25%, the rollingforce to be 23929 kn to 26448 kn and the speed to be 79 mpm to 81 mpm; controlling the reduction ratio of a second rack to be 15% to 25%, the rolling force to be 24752 kn to 27356 kn, the speed to be104 mpm to 106 mpm and the forward slip to be -0.955 to 3.045; controlling the reduction ratio of a third rack to be 15% to 25%, the rolling force to be 23465 kn to 25935 kn, the speed to be 154 mpmto 156 mpm and the forward slip to be -0.954 to 3.046; controlling the reduction ratio of a fourth rack to be 12%-20%, the rolling force to be 23144 kn to 25580 kn, the speed to be 199 mpm to 201 mpmand the forward slip to be -0.957 to 3.043; and controlling the reduction ratio of a fifth rack to be 5% to 15%.

Description

technical field [0001] The invention relates to the technical field of continuous cold rolling, in particular to a rolling method and device for high-strength steel. Background technique [0002] Ultra-high-strength steel refers to strip steel with a yield strength greater than 590Mpa, mainly including dual-phase steel such as DP590 and DP780. Dual-phase steel is also called DP steel. obtained high-strength steel. [0003] At present, with the expansion of high-strength steel products, acid rolling and tandem cold rolling mills have realized the expansion of DP590, DP780 and other products, but as users put forward high-strength steel automotive sheet requirements, the current rolling capacity of acid rolling is obviously limited, and it is impossible to achieve 0.7 Stable production of high-strength steel with a thickness specification of ~1.0mm and a width specification of 1~1.9m. Contents of the invention [0004] Aiming at the problems existing in the prior art, the ...

Claims

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Application Information

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IPC IPC(8): B21B1/28B21B37/48B21B37/56B21B37/58B21B37/00
CPCB21B1/28B21B37/00B21B37/48B21B37/56B21B37/58
Inventor 王艳超齐海峰马龙吉志明巫咸圣关军韩法王飞王少飞宁媛媛
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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