ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Thermal Diffusivity Measurement of Oxide Scale Formed on Steel during Hot-rolling Process
Rie EndoTakashi YagiMitsutoshi UedaMasahiro Susa
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2014 Volume 54 Issue 9 Pages 2084-2088

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Abstract

Thermal diffusivity and conductivity of oxide scales formed on steel plates are essential to control the cooling rate of the steel in the hot-rolling process. A flash method was applied to measure the thermal diffusivity of oxide scales. Sample specimens were commercial hot-rolled plates on which about 25 μm-thick oxide scales were formed. The results of the flash measurement with the analysis for two-layered sample provided an average thermal diffusivity value of 7.3 × 10–7 m2s–1 for the oxide scale. This value produces a thermal conductivity value of 3.8 W m–1 K–1. The future application of this measurement and analysis technique was also discussed to derive the thermal diffusivity and conductivity of oxide scales formed in actual hot-rolling processes.

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© 2014 by The Iron and Steel Institute of Japan
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