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Method and apparatus for controlled cooling

A technology of equipment and cooling fluid, which is used in the field of accelerated cooling and direct quenching of steel strips and steel plates, and can solve problems such as unevenness and large gaps

Inactive Publication Date: 2011-03-02
PRIMETALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Applying this large flow rate by zoned injection in addition to the cooling flow rate, the cooling process is negatively affected because the top and bottom cooling can become uneven due to the large gap between the flow rates cooling the top and bottom surfaces

Method used

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  • Method and apparatus for controlled cooling
  • Method and apparatus for controlled cooling

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Embodiment Construction

[0034] For brevity, figure 2Only a single nozzle 10 of a zoned injection arrangement is shown, but it should be clear that the principles also apply to all nozzles of a zoned injection arrangement in a controlled cooling plant. exist figure 2 Among them, the adjustable valve 14 is installed between the water supply pipe 13 and the partition spray nozzle 23 . The supply water pressure is nominally constant, but in real systems this pressure varies by small amounts due to the characteristics of the pump or the characteristics of the pressure relief valve. The pressure at the zoned injection nozzles can be varied by opening or closing the adjustable valve 14 . Closing the valve 14 produces a greater pressure drop across the valve 14, and therefore, the pressure in the zone spray nozzle decreases, thereby reducing the flow rate out of the zone spray device including the nozzle 23, because the flow rate out of the nozzle 23 is approximately the same as proportional to the squa...

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PUM

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Abstract

The invention relates to a method and an apparatus for controlled cooling of hot rolled metal (1) using zone separation spray devices (10, 11, 12) which are adjustable as a function of the cooling flow (5, 8) applied.

Description

technical field [0001] The present invention relates to the general field of controlled cooling of hot-rolled metals, and more particularly to accelerated cooling and direct quenching of steel strips and plates. Background technique [0002] Controlled cooling of hot rolled steel is very important to achieve the desired microstructure and properties of the steel product. For this reason, modern steel plate and hot strip plants usually use powerful cooling systems, whereby accurate control of temperature and cooling rate is very important. Water is generally used as the cooling fluid. [0003] One of the most successful designs of equipment for controlled cooling is that with multiple top and bottom cooling heads, whereby jets of cooling water are sprayed onto the top and bottom surfaces of hot-rolled metal sheet or strip , such as described in EP0178281. [0004] A simplified cross section of this type of device is shown in figure 1 shown. The hot-rolled metal sheet or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02C21D9/52B21B37/76
CPCC21D1/667B21B37/76H04W4/10C21D11/005B21B45/0218H04W76/005H04W76/025C21D9/5735H04W72/10H04W76/45H04W76/15H04W72/56B21B37/44B21B37/74B05B1/28B21B27/06B21B27/00
Inventor A·马利森P·派斯利
Owner PRIMETALS TECH