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Cooling method for replacement of hot roll

A cooling method and technology for hot rolls, applied in rolls, metal rolling, metal rolling, etc., can solve the problem that the cooling method cannot meet the requirements for the use of rolls

Inactive Publication Date: 2015-12-30
铜陵翔宇商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the rolling process, the instantaneous temperature of the roll can reach 700-800°C. After a certain period of water cooling, the temperature is 80-100°C. During the rolling process, the strip steel has a certain offset, resulting in the temperature distribution of the roll. At this time, the shape of the roll is changed due to the influence of temperature, so the roll must be cooled to normal temperature before grinding the roll to avoid the influence of the temperature of the roll, and the existing cooling method cannot meet the requirements of the use of the roll Require

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] A cooling method for replacing hot rolls, the weight percentages of the roll components are: C: 0.9%-1.0%, Si: 0.7%-0.9%, Mn: 0.4%-0.6%, Cr: 6.5%-7.0%, Mo : 0.5%-0.8%, V: 0.2%, Ni: 0.2%-0.35%, P: 0.015%, S: 0.010% The rest are Fe and impurities,

[0013] The steps are:

[0014] 1) Cool the hot rolls before replacement by cooling water, and stop the cooling when the rolling mill stops and the rolls are lifted.

[0015] 2) Naturally cool the roll for 40 minutes,

[0016] 3) Forced cooling of the rolls on the roll platform by spraying cooling water

[0017] The embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

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PUM

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Abstract

The invention discloses a cooling method for replacement of a hot roll. The roll comprises components in percentage by weight as follows: 0.9%-1.0% of C, 0.7%-0.9% of Si, 0.4%-0.6% of Mn, 6.5%-7.0% of Cr, 0.5%-0.8% of Mo, 0.2% of V, 0.2%-0.35% of Ni, 0.015% of P, 0.010% of S and the balance of Fe and impurities. The roll is cooled by cooling water before replacement of the roll and then replaced, so that the roll is naturally cooled during roll replacement, finally, forced cooling is performed on the unloaded roll with the cooling water, and the roll can be cooled to the normal temperature rapidly and effectively.

Description

technical field [0001] The present invention relates to a cooling method for replacing hot rolls. Background technique [0002] During the rolling process of the roll, the instantaneous temperature can reach 700-800 ℃. After a certain period of water cooling, the temperature is 80-100 ℃. During the rolling process, the strip steel has a certain offset, resulting in the temperature distribution of the roll. At this time, the appearance of the roll is deformed by the influence of temperature. Therefore, when grinding the roll, the roll must be cooled to room temperature to avoid the influence of the temperature of the roll, and the existing cooling method cannot meet the requirements of the use of the roll. Require. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a cooling method for replacing hot rolls. [0004] The technical scheme adopted in the present invention is: [0005] A cooling method for replacing hot rolls, the weight perce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/10
Inventor 沙以仙
Owner 铜陵翔宇商贸有限公司