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Cooling method of steel plate

一种冷却方法、钢板的技术，应用在工件冷却装置、工件表面处理设备、金属轧制等方向，能够解决热传导率预测精度不充分等问题

Active Publication Date: 2009-02-25
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, in the technology disclosed in Japanese Patent Application Laid-Open No. 2-179819, since this situation is not sufficiently considered, the prediction accuracy of thermal conductivity is insufficient.

Method used

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  • Cooling method of steel plate
  • Cooling method of steel plate
  • Cooling method of steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0128] This embodiment is shown in Fig. 1~ image 3 The example of the cooling equipment for the steel plate as shown is to remove the scale of the steel plate (steel strip) after hot finish rolling with a plate thickness of 25mm, a plate width of 4000mm, and a temperature of 850°C. In bound roll pair 2 1 -2 2 Constraint conveying between the two 1 -2 2 Between the upper and lower nozzle group 6 1 An example of the case where each nozzle 3 of the upper and lower nozzle groups 6a, 6b sprays cooling water to cool the steel plate 1 to 400°C at a cooling rate of 30°C / sec.

[0129] In the actual cooling equipment, the upper and lower nozzle groups 6 connected between the constraining roller pairs 1 The cooling is shared by the upper and lower nozzle groups respectively arranged between multiple pairs of constrained roller pairs, and here is the upper and lower nozzle group 6 involving the constrained roller pairs. 1 Example of cooling in the unit. #

[0130] In this embodimen...

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Abstract

A method for cooling the opposite surfaces of a steel plate under clamp conveyance between a clamp roll pair with refrigerant jet flow from the upper / lower surface nozzle groups between the clamp roll pair in which the upper and lower surfaces of a steel plate is cooled uniformly and precisely down to a target temperature while the quality of steel material is stably ensured by ensuring cooling control precision stably from start of cooling to end of cooling in the steel plate cooling region between the clamp roll pair. The steel plate cooling region between each clamp roll pair in which the upper / lower surface nozzle group is arranged is divided into at least a jet flow collision region and a jet flow non-collision region in the steel plate conveyance direction or in the steel plate conveyance direction and the width direction, heat transfer coefficient is predicted previously for each divided region, prediction temperature history of the steel plate is operated based on the prediction value, and then the quantity of refrigerant being jetted to the jet flow collision region of the upper / lower surface nozzle group is set and controlled.

Description

technical field [0001] The present invention relates to a steel plate (mainly a thick steel plate, hereinafter referred to as a "steel plate") when the steel plate is constrained between a plurality of pairs of constraining roll pairs in the hot rolling process or heat treatment process of the steel plate, and the temperature in the pass is several hundred degrees or more. ) is sprayed with refrigerant (a cooling medium composed of water or a mixture of water and air; A steel plate cooling method used to obtain a high-quality steel plate with uniform shape and material properties. Background technique [0002] For example, steel sheet manufacturing facilities equipped with a process called controlled cooling for rapidly cooling (accelerated cooling) a hot-rolled high-temperature steel sheet with cooling water to obtain a quenching effect and impart high strength to the steel sheet have been put into practical use. [0003] As the controlled cooling device used here, in Fig....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02
CPCB21B45/0218B21B37/74B21B45/06B21B45/08
Inventor 芹泽良洋山本龙司小川茂
Owner NIPPON STEEL CORP
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