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Effect of hot rolling process parameters on the microstructure and mechanical properties of continuously cooled low-carbon high-strength low-alloy (HSLA) steel

  • Furkan Yılmaz Küçükakarsu

    Furkan Yılmaz Küçükakarsu, born in 1993, graduated from the Karabük University Manufacturing Engineering Department, Karabük, Turkey, in 2016. Currently, he is an M.Sc. student in the Karabük University, Karabük, Turkey. He is working as an R&D Engineer at ÇEMTAŞ A.Ş, Bursa, Turkey.

    , İsmail İrfan Ayhan

    İsmail İrfan Ayhan, born in 1969, graduated from the Middle East Technical Universty, Ankara, Turkey, in 1992, and received his M.Sc. degree in 1997 in the area of Metallurgy Engineering from the Middle East Technical University, Ankara, Turkey. He is working as a Technical Deputy General Manager at ÇEMTAŞ A.Ş, Bursa, Turkey.

    , Emre Alan

    Emre Alan, born in 1987, graduated from the Istanbul Technical University Metallurgical and Materials Engineering Department, Istanbul, Turkey, in 2010, and received his M.Sc. degree from the Istanbul Technical University Material Science, Istanbul, Turkey, in 2013. Currently, he is a Ph.D. candidate in Bursa Technical University Advanced Material Technologies, Bursa, Turkey, and he is working as an R&D Chief Engineer at ÇEMTAŞ A. Ş., Bursa, Turkey.

    , Demet Taştemür

    Demet Taştemür, born in 1988, received his B.Sc. degree from the Kırıkkale University, Turkey, in 2011, and his M.Sc. degree from the Karabuk University in 2018. She is a research asistant at the Department of Manufacturing Engineering, Technology Faculty of the Karabuk University, Turkey.

    and Süleyman Gündüz EMAIL logo
Published/Copyright: August 5, 2022
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Abstract

In this work, high-strength low-alloy (HSLA) steel with 0.22 wt% carbon was produced in laboratory scale and hot rolled with a total deformation of 42% via 4, 5, or 6 passes. After multipass hot rolling process, samples were examined either in as-rolled (AR) or as-rolled and heat-treated (ARH) conditions. The results indicated that microstructural and mechanical properties of HSLA steels are influenced by hot rolling conditions for both cases. It was observed that strength values in AR samples have a tendency to increase with increment in rolling pass number. In contrast to AR samples, it was seen that the mechanical properties were slightly decreased in ARH samples that were austenitized at 1150 °C for 45 min and then cooled in still air. Microstructural investigations showed that finer precipitates in AR samples are obviously more than that of ARH samples, as an evidence for higher strength results by precipitation hardening. In addition to precipitation strengthening, refinement of lath bainite and amount of blocky martensite/austenite in AR samples favor the increase in strength.


Corresponding author: Süleyman Gündüz, Department of Manufacturing Engineering, Technology Faculty, Karabük University, Karabük, Turkey, E-mail:

About the authors

Furkan Yılmaz Küçükakarsu

Furkan Yılmaz Küçükakarsu, born in 1993, graduated from the Karabük University Manufacturing Engineering Department, Karabük, Turkey, in 2016. Currently, he is an M.Sc. student in the Karabük University, Karabük, Turkey. He is working as an R&D Engineer at ÇEMTAŞ A.Ş, Bursa, Turkey.

İsmail İrfan Ayhan

İsmail İrfan Ayhan, born in 1969, graduated from the Middle East Technical Universty, Ankara, Turkey, in 1992, and received his M.Sc. degree in 1997 in the area of Metallurgy Engineering from the Middle East Technical University, Ankara, Turkey. He is working as a Technical Deputy General Manager at ÇEMTAŞ A.Ş, Bursa, Turkey.

Emre Alan

Emre Alan, born in 1987, graduated from the Istanbul Technical University Metallurgical and Materials Engineering Department, Istanbul, Turkey, in 2010, and received his M.Sc. degree from the Istanbul Technical University Material Science, Istanbul, Turkey, in 2013. Currently, he is a Ph.D. candidate in Bursa Technical University Advanced Material Technologies, Bursa, Turkey, and he is working as an R&D Chief Engineer at ÇEMTAŞ A. Ş., Bursa, Turkey.

Demet Taştemür

Demet Taştemür, born in 1988, received his B.Sc. degree from the Kırıkkale University, Turkey, in 2011, and his M.Sc. degree from the Karabuk University in 2018. She is a research asistant at the Department of Manufacturing Engineering, Technology Faculty of the Karabuk University, Turkey.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Published Online: 2022-08-05
Published in Print: 2022-08-26

© 2022 Walter de Gruyter GmbH, Berlin/Boston

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