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Ultra-fast cooling method for hot-rolled extra-thick plate

A technology of ultra-thick plate and ultra-fast cooling, which is applied in the direction of metal rolling, metal rolling, workpiece cooling devices, etc., can solve the problems of unsatisfactory ultra-fast cooling, uneven cooling, long production line, etc., to improve surface quality, Prevent surface rust and increase cooling speed

Active Publication Date: 2022-01-28
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide an ultra-fast cooling method for hot-rolled extra-thick plates, which solves the problem of ultra-fast cooling in the prior art by only relying on cooling water. Uneven cooling in the thickness range of fast cooling, relying on the long production line of air mist cooling, and slow cooling speed can not meet the requirements of ultra-fast cooling

Method used

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  • Ultra-fast cooling method for hot-rolled extra-thick plate
  • Ultra-fast cooling method for hot-rolled extra-thick plate
  • Ultra-fast cooling method for hot-rolled extra-thick plate

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Effect test

Embodiment 1

[0099] In the specific implementation of the test, a box-type heating furnace was used to heat the hot-rolled extra-heavy plate with a thickness of 120mm, a width of 100mm, and a length of 200mm. The soaking temperature was 1150°C. The temperature in the cross-section is uniform, and the temperature is kept for 20 minutes after the temperature is raised to the set temperature. After the sample comes out of the furnace, it is placed on the ultra-fast cooling device, and it is subjected to alternate cooling water cooling and air mist cooling. After spraying according to the preset time, the sample is air-cooled on the cooling device. The collected process parameters include water pressure, water volume, air pressure and air volume.

[0100] The hot-rolled extra-thick plate is transported to the mobile stand by the electric sample rack with lifting unit, and pushed to the ultra-fast cooling device through the cylinder, and its stop position is controlled by the displacement relay...

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Abstract

The invention discloses an ultra-fast cooling method for a hot-rolled extra-thick plate, belongs to the technical field of steel rolling processes, and solves the problems that in the prior art, ultra-fast cooling is conducted only through cooling water, cooling is not uniform within the thickness range, and the requirement for ultra-fast cooling cannot be met due to the fact that an aerial fog cooling production line is long and the cooling speed is low. The ultra-fast cooling method comprises the following steps that the hot-rolled extra-thick plate is moved to a cooling water area to be cooled through cooling water; the hot-rolled extra-thick plate from the cooling water area is moved to an aerial fog area, and aerial fog cooling is performed; the hot-rolled extra-thick plate subjected to aerial fog cooling is subjected to temperature returning; and the step 1 to the step 2 are repeated for at least one time, and ultra-fast cooling of the hot-rolled extra-thick plate is completed. The ultra-fast cooling method can be used for ultra-fast cooling of the hot-rolled extra-thick plate.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to an ultra-fast cooling method for hot-rolled extra-thick plates. Background technique [0002] In the prior art, cooling water is usually used for ultra-fast cooling. However, for ultra-thick plates, after the cooling rate reaches a certain value, the core is cooled slowly due to the limitation of heat conduction rate, which may easily cause cooling within the thickness range. uneven. [0003] However, the gas mist cooling method cannot meet the requirements of ultra-fast cooling because it takes time for gasification, the production line is longer, and the cooling rate is slower. Contents of the invention [0004] In view of the above analysis, the present invention aims to provide an ultra-fast cooling method for hot-rolled extra-thick plates, which solves the problem of uneven cooling in the thickness range of ultra-fast cooling only by cooling water in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02
CPCB21B45/0218B21B45/0233
Inventor 王卫卫肖金福白宇冯光宏胡霄雨张宏亮
Owner CENT IRON & STEEL RES INST
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