Method for preventing generation of roll marks on hot rolled steel strips with medium and high content of carbon

A hot-rolled strip, medium and high carbon technology, applied in the driving device of metal rolling mill, metal rolling, metal rolling, etc., can solve the problem of not completely preventing roll damage, etc. The effect of excessive cooling

Active Publication Date: 2019-01-18
湖南华菱涟源钢铁有限公司
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  • Claims
  • Application Information

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Problems solved by technology

This process, to adjust the flow of cooling water in the finishing mill, needs to collect process parameters in time and give feedback, and only for the adjustment of cooling water flow in the finishing mill, it cannot completely prevent the damage of the rolls, and then in the strip roller print

Method used

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  • Method for preventing generation of roll marks on hot rolled steel strips with medium and high content of carbon
  • Method for preventing generation of roll marks on hot rolled steel strips with medium and high content of carbon
  • Method for preventing generation of roll marks on hot rolled steel strips with medium and high content of carbon

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Embodiment approach

[0036]An embodiment of the present invention, a method for preventing roll marks from being produced on medium-high carbon hot-rolled steel strip, comprises the following steps:

[0037] S01: Obtain the values ​​of the finishing temperature of hot rolling, the thickness and width of strip steel 1 after hot rolling;

[0038] S02: According to the hot-rolling finishing temperature, the thickness and width of the strip 1 after hot rolling, separately control the closing or opening of each water cooling device in the finishing mill, and control the strip 1 in the seventh finishing mill F7 Maximum threading speed in the frame.

[0039] According to the order of the finishing mills biting the steel, the finishing mills successively include the first finishing mill F1, the second finishing mill F2, the third finishing mill F3, the fourth finishing mill F4, the fifth finishing mill F5, and the sixth finishing mill F6, the seventh finishing mill F7;

[0040] Wherein, the weight perce...

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Abstract

The invention belongs to the technical field of manufacturing of steel and discloses a method for preventing generation of roll marks of hot rolled steel strips with a medium and high content of carbon. The method comprises the steps of obtaining hot rolling final rolling temperature and values of the thickness and width of the steel strips after hot rolling; according to the hot rolling final rolling temperature and the values of the thickness and width of the steel strips after hot rolling, separately controlling closing or opening of each water cooling device in a finishing rolling unit alone and controlling the maximum strip passing speed of the steel strips in a rack of a seventh finishing rolling machine. By comprehensively controlling closing or opening of each water cooling devicein the finishing rolling unit, controlling the strip passing speed of the rack of the seventh finishing rolling machine and controlling the diameter of a working roller of the rack of the seventh finishing rolling machine, the generation of the roll marks on the steel strips can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of iron and steel manufacturing, and in particular relates to a method for preventing roll marks from occurring on medium-high carbon hot-rolled strip steel. Background technique [0002] In the rolling production process of hot-rolled steel coils, after the slab is heated by the heating furnace, it is descaled by the rough descaling machine and rolled by the rough rolling mill to form an intermediate billet with good surface quality. scale mill, and then enter the finishing mill, where the strips are gradually thinned and rolled into target thickness strips in each finishing mill. According to the traditional control method, the thinned strips will encounter roll gap spray water, Longitudinal water spraying and cooling water cooling between the stands, the temperature of the head of the strip gradually decreases after encountering water; the head of the strip is cooled by water between the F1-F5 stands of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B37/74B21B37/16B21B37/22B21B45/02
CPCB21B1/22B21B37/165B21B37/22B21B37/74B21B45/0218B21B2001/225B21B2275/02
Inventor 刘浩曾斌李光辉汪净刘旭辉罗钢黄建波
Owner 湖南华菱涟源钢铁有限公司
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