CAPACITY OF THE INTERSTAND COOLING UNIT IN HOT ROLLING PROCESS

Vladimir L Brovkin,Ladislav Lazic,Jan Kizek,Vladislav A Kachal,Augustin Varga,Svetlana V Brovkina,Tatiana V Doroshenko

doi:10.12776/ams.v20i4.388

Vladimir L Brovkin, Ladislav Lazic + Show 5 more

Open Access

https://doi.org/10.12776/ams.v20i4.388

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Abstract

The aim of the paper was to improve the economy of rolling mill production and to extend the control range of cooling capacity of the accelerated cooling unit by choosing the optimal dimensions of the cooling chamber. The object of research was the interstand cooling unite for accelerated cooling of the hot-rolled products of round section in the line of continuous rolling mill in order to reduce the machine time rolling or even eliminate completely the requirement for heat treatment of the hot-rolled products in heat-treatment furnaces. The influence of the design parameters of the cooling chamber on the expanding the control range, retaining a high cooling capacity of the chamber, was investigated by the numerical model based on the finite difference method. The diagrams presented in the paper allow determining the diameters of the cooling chamber, which provide a wide control range of the chamber cooling capacity and minimization of energy consumption of the electric water pump.

Highlights

During hot rolling process, the evolution of the microstructure is connected with physical processes taking place in the deformed steels, such as recrystallization, precipitation and phase transformation, depending on the chemical composition and particular parameters of the metal forming process, i.e. the strain, strain rate and temperature
The aim of the paper was to improve the economy of rolling mill production and to extend the control range of cooling capacity of the accelerated cooling unit by choosing the optimal dimensions of the cooling chamber
Thermomechanical Controlled Processing (TMCP) including accelerated cooling is a well-established technology, widely applied in steel rolling production in order to produce a material with the desired microstructures and mechanical properties as well as to reduce the machine time rolling or even eliminate completely the requirement for heat treatment of the hot-rolled products in heattreatment furnaces [1,2,3,4,5]

Summary

Introduction

During hot rolling process, the evolution of the microstructure is connected with physical processes taking place in the deformed steels, such as recrystallization, precipitation and phase transformation, depending on the chemical composition and particular parameters of the metal forming process, i.e. the strain, strain rate and temperature. Thermomechanical Controlled Processing (TMCP) including accelerated cooling is a well-established technology, widely applied in steel rolling production in order to produce a material with the desired microstructures and mechanical properties as well as to reduce the machine time rolling or even eliminate completely the requirement for heat treatment of the hot-rolled products in heattreatment furnaces [1,2,3,4,5]. In order to reduce the production cost and to improve the quality of hot-rolled steel round products of small-section in the line of continuous mills, the technology of accelerated interstand cooling is used By using this technology, the hot-rolled products with the desired microstructures and mechanical properties have been produced and the cost of energy to heat the metal in special heat-treatment furnaces is decreased [6,7,8].

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