Journal of Northeastern University ›› 2013, Vol. 34 ›› Issue (8): 1118-1122.DOI: -

• Materials & Metallurgy • Previous Articles     Next Articles

Emissivity IndirectMeasurement and Analysis for Hot Rolled Strip

PENG Lianggui1, ZHANG Dianhua1, GUO Tao2, LEI Honggang2   

  1. 1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China; 2. Hot Strip Mill, Panzhihua Steel Group, Panzhihua 617062, China.
  • Received:2012-11-27 Revised:2012-11-27 Online:2013-08-15 Published:2013-03-22
  • Contact: PENG Lianggui
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Abstract: Emissivity of hot rolled strip after laminar cooling and before coiling was calculated by temperature field technology which uses CrankNicolson implicit difference method based on measured temperature data. The effects of carbon equivalent, strip thickness and strip temperature on the emissivity were analyzed. The results showed that the prime influencing factors are different under different strip temperature range. When the temperature is beyond 550℃, the strip emissivity varies between 07 and 09, and with the increasing in carbon equivalent, the accordingly strip emissivity increases smoothly. However, when the temperature is below 550℃, the strip emissivity decreases rapidly with the increasing of strip thickness, and there is no obvious relationship between strip emissivity and carbon equivalent.

Key words: emissivity, temperature field, heat transfer model, hot rolled strip, runout table

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