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Advanced temperature control of high carbon steel for hot strip mills

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Abstract

In this paper, an advanced temperature control for the high carbon steel is proposed to obtain the desirable temperature and property of a steel on the run-out table (ROT) process. The temperature model based on the nonlinear heat transfer equation is described to predict the temperature of the steel at each position of the ROT. A cooling stop temperature (CST) concept is proposed to increase the volume fraction of the transformed phase for the high carbon steel. The concept is derived from a time-temperature transformation (TTT) diagram which is measured from the dilatometric experiment. The simulator using the temperature model is developed to achieve the desired temperature, and the effectiveness of the proposed control is also analyzed from the simulation. It is shown through the field test of the hot strip mill of POSCO that the performance with respect to the temperature and the property of the steel is greatly improved by the proposed control technology.

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Authors and Affiliations

  1. School of Automotive, Industrial and Mechanical Engineering, Daegu University, Gyeongsan, 712-714, Korea

    Cheol Jae Park & Kang Sup Yoon

  2. Technical Research Laboratories, POSCO, Pohang, 790-785, Korea

    Chang Hoon Lee

Authors
  1. Cheol Jae Park
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  2. Kang Sup Yoon
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  3. Chang Hoon Lee
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Corresponding author

Correspondence to Cheol Jae Park.

Additional information

This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim

Cheol Jae Park received his B.S. and M.S. degrees in Mechanical Engineering from Pusan National University, Korea, in 1992 and 1994, respectively. He then received his Ph.D. degree from Seoul National University, Korea, in 2007. He is currently a Professor at the School of Automotive, Industrial and Mechanical Engineering at Daegu University, Korea. His research interests include receding horizon control, robust control, process control, system identification, and robotics.

Kang Sup Yoon received his B.S., M.S. and Ph.D. degrees in Mechanical Engineering from Pusan National University, Pusan, Korea, in 1986, 1988, and 1997, respectively. From September 1997 to February 2000, he was a postdoctoral fellow in the Institute of Industrial Science, University of Tokyo, Japan. He has been with the School of Automotive, Industrial and Mechanical Engineering, Daegu University, Gyeongsan, Korea, since April 2000. His current research interests include control theory, robotics, and mechatronics.

Chang Hoon Lee received his B.S., M.S. and Ph.D. degrees in Materials Science and Engineering from Seoul National University, Korea, in 1998, 2000 and 2005, respectively. Dr. Lee is currently a Senior Reseacher at the technical reseach laboratories of POSCO in Pohang, Korea. Dr. Lee’s research interests include high car-bon steels and high strength hot rolled steels.

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Park, C.J., Yoon, K.S. & Lee, C.H. Advanced temperature control of high carbon steel for hot strip mills. J Mech Sci Technol 24, 1011–1017 (2010). https://doi.org/10.1007/s12206-010-0317-4

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  • DOI: https://doi.org/10.1007/s12206-010-0317-4

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