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Hot roll replacing and cooling method

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: 2015-12-09
铜陵市大明玛钢有限责任公司
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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 percentage of roll components is: C: 1.0%, Si: 0.8%-0.9%, Mn: 0.5%-0.6%, Cr: 7.0%, Mo: 0.6%-0.7% ,V:0.25%,Ni:0.25%-0.3%,P:0.02%,S:0.015%,the rest are Fe and impurities,

[0013] The steps are:

[0014] 1) Use cooling water to cool the hot roll before replacement, and stop cooling when the roll machine is shut down and the roll is hoisted.

[0015] 2) Cool the roll for 50 minutes naturally,

[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 embodiments, and various changes can be made within the scope of knowledge of those of ordinary skill in the art without departing from the gist of the present invention.

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PUM

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Abstract

The invention discloses a hot roll replacing and cooling method. A roll comprises, by weight percentage, 1.0% of C, 0.8-0.9% of Si, 0.5%-0.6% of Mn, 7.0% of Cr, 0.6%-0.7% of Mo, 0.25% of V, 0.25%-0.3% of Ni, 0.02% of P, 0.015% of S and the balance Fe and immunities. According to the hot roll replacing and cooling method, the roll is cooled through cooling water before being replaced, then the roll is replaced, the roll is cooled naturally while being replaced, and finally forced cooling is conducted on the roll offline through cooling water so that the roll can be cooled quickly and effectively to the normal temperature.

Description

technical field [0001] The invention relates to a cooling method for replacing hot rolls. Background technique [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. Contents 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 percentage of roll c...

Claims

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Application Information

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IPC IPC(8): B21B27/10
Inventor 张曌章成希
Owner 铜陵市大明玛钢有限责任公司