Laminar cooling process control device and method for hot rolled strip steel

A laminar cooling, hot-rolled strip technology, applied in temperature control and other directions, can solve the problems of uneven temperature distribution and distribution of microstructure and properties

Active Publication Date: 2014-10-01
北京中冶设备研究设计总院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of uneven distribution of temperature and microstructure along the width direction of the steel strip in the production process, and proposes to use the finite element analysis method to analyze and calculate the temperature time variation law along the width direction of the plate during the laminar flow cooling process. and the uniformity of temperature distribution and tissue performance distribution, and set the edge shielding process through quantitative analysis to improve the uniformity of tissue performance from the center to the edge of the strip steel, and use network transmission technology in the system to link site demand and forecast A hot-rolled strip laminar flow cooling process control device and method that can realize online process setting and optimization of target temperature and target performance by connecting systems

Method used

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  • Laminar cooling process control device and method for hot rolled strip steel
  • Laminar cooling process control device and method for hot rolled strip steel
  • Laminar cooling process control device and method for hot rolled strip steel

Examples

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Embodiment 1

[0084] Example 1: For beam steel with a specification of 1900mm×8mm, the temperature after finish rolling is 860°C, the required coiling temperature is 620°C, and the running speed during cooling is 4.5m / s. After MARC finite element software simulation, it is determined that the laminar cooling mode of this specification is 110-1111000000 (manifold opening and closing mode in the laminar cooling area, 3 groups in the strong cooling area, 2 groups before opening, and 10 groups in the slow cooling area, 4 groups before opening ). During the laminar cooling process, the edge shielding process is applied in the slow cooling zone, and the shielding amount is 0mm. The temperature of the steel plate after cooling is roughly around the required crimping temperature of 620°C. The simulation results are: the temperature in the middle of the steel plate is 630°C, and the temperature at the edge is 574°C. The temperature difference in the width direction was 56°C.

Embodiment 2

[0085] Embodiment 2: For beam steel with a specification of 1900mm×8mm, the temperature after finish rolling is 860°C, the required coiling temperature is 620°C, and the running speed during cooling is 4.5m / s. After MARC finite element software simulation, it is determined that the laminar cooling mode of this specification is 110-1111000000 (manifold opening and closing mode in the laminar cooling area, 3 groups in the strong cooling area, 2 groups before opening, and 10 groups in the slow cooling area, 4 groups before opening ). In the process of laminar cooling, the edge shielding process is applied in the slow cooling zone, the shielding amount is 100mm, and the temperature of the steel plate after cooling is roughly around the required crimping temperature of 620°C. The simulation results are: the temperature in the middle of the steel plate is 630°C, and the temperature at the edge is 589°C. The temperature difference in the width direction was 41°C.

Embodiment 3

[0086] Example 3: For beam steel with a specification of 1300mm×5mm, the temperature after finish rolling is 860°C, the required coiling temperature is 620°C, and the running speed during cooling is 7m / s. After MARC finite element software simulation, it is determined that the laminar cooling mode of this specification is 110-1111000000 (manifold opening and closing mode in the laminar cooling area, 3 groups in the strong cooling area, 2 groups before opening, and 10 groups in the slow cooling area, 4 groups before opening ). In the process of laminar cooling, the edge shielding process is applied in the slow cooling zone, and the shielding amount is 0mm. The temperature of the steel plate after cooling is roughly around the required crimping temperature of 620°C. The simulation results are: the temperature in the middle of the steel plate is 630°C, and the temperature at the edge is 588°C. The temperature difference in the width direction was 42°C.

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Abstract

The invention discloses a laminar cooling process control device and method for hot rolled strip steel. The laminar cooling process control method includes parameter setting, structure property predicting, target technique optimizing, network data transmitting and field control modules. The laminar cooling process control device mainly comprises a finishing mill group, a temperature measuring device, a temperature gathering device, a laminar cooling device, an edge masking device and a reeling machine; the temperature measuring device and the temperature gathering device measure and gather the temperature distribution of the hot rolled strip steel in the width direction when being discharged from the finishing mill group, the temperature distribution is transmitted to a computer simulation module in a data mode to analyze and process to determine a proper cooling mode, and a field executing mechanism controls the open number of cooling manifolds and the edge masking amount of the edge masking device to enable the temperature of the strip steel at the inlet of the reeling machine to be less than 50 degrees centigrade. The laminar cooling process control device and method for the hot rolled strip steel solve the problem of non-uniform structure property of the strip steel along the width direction and guarantee the excellent quality and uniform structure property distribution of the strip steel.

Description

Technical field: [0001] The invention relates to the technical field of steel rolling auxiliary equipment and computer industrial control, in particular to a control device and method for laminar flow cooling process of hot-rolled strip steel. Background technique: [0002] In the prior art, the laminar flow cooling process control of hot-rolled strip steel has become one of the important links in the process control of high-strength steel plate production. In order to ensure the product performance and product quality of hot-rolled strip steel, precise cooling process control is the basic guarantee. In the laminar cooling process of hot-rolled strip steel, the control of cooling speed, cooling uniformity and coiling target temperature are the most important parameters, which affect the final metallographic structure and properties of the strip product. To this end, establishing a laminar cooling control model, analyzing the cooling rate of the strip and the evolution of mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74
Inventor 李军朱国辉王科陈其伟肖湖福杨树宝葛国军胡敏燕朱恒杨玉芳林红
Owner 北京中冶设备研究设计总院有限公司
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