Abstract

A mathematical model of the thermal state of the metal in the run-out roller table continuous wide hot strip mill. The mathematical model takes into account heat generation due to the polymorphic ? ? ? transformation of supercooled austenite phase state and the influence of the chemical composition of the steel on the physical properties of the metal. The model allows calculation of modes of accelerated cooling strips on run-out roller table continuous wide hot strip mill. Winding temperature calculation error does not exceed 20°C for 98.5 % of strips of low-carbon and low-alloy steels

Highlights

  • I n a highly competitive market, each steel group strives to improve product quality

  • The mathematical model takes into account heat generation due to the polymorphic γ → α transformation of supercooled austenite phase state and the influence of the chemical composition of the steel on the physical properties of the metal

  • The mathematical model of the thermal state of the metal in the collecting roller table is based on the definition of the space-time temperature field strip

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Summary

INTRODUCTION

I n a highly competitive market, each steel group strives to improve product quality. The mathematical model of the thermal state of the metal in the collecting roller table is based on the definition of the space-time temperature field strip. The calculation of heat flow and heat transfer coefficient is performed on the dependence presented in [1,2,3] for the conditions of collecting roller table of continuous strip hot rolling mill (CSHRM). To calculate the polymorphic transformation in the collecting roller table to know Ar3 transformation temperature of the beginning and end of the conversion of Ar1 These parameters depend on the chemical composition of steel, the cooling rate, the dislocation density in the crystal lattice, the grain size and strain rate prior to the metal.

ADAPTATION OF A MATHEMATICAL MODEL
Findings
CONCLUSION
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