Effect of Direct Rolling of Without-Heating on the Differentiation of Mechanical Properties of Rebar

Abstract:

This paper focuses on the mechanical property differentiation and phase content differentiation of HRB400 rebars under the direct rolling of without-heating (DROW) process. The results showed that the temperature distribution from the head region to the tail region of the billet before rolling under the DROW process was different compared to the traditional hot rolling (THR) process, which resulting in the difference of each phase volume fractions and the grain size of the rebar. Compared with the THR process, the phase distribution of the rebars under the DROW process is not uniform, showing the characteristics of low ferrite content in the head region, followed by the tail region, and the highest in the middle region. It was demonstrated that the DROW process could improve the mechanical properties of the rebar, but the difference in phase content and grain size distribution leads to a large variability in the enhancement of the mechanical properties of rebar rolled in different areas of the billet.

• Periodical: Materials Science Forum (Volume 1078)
• Pages: 173-178
• DOI: https://doi.org/10.4028/p-8i1ydk
• Online since: December 2022
• Authors: Xin Liu*, Bao Yu Song, Yang Zhao, Xu Ming Liu, Jun Sheng Wang
• Keywords: Direct Rolling, Grain Size, Mechanical Properties, Phase Content, Without-Heating

References

[1] Zaky AI, El-Morsy A, El-Bitar T. Effect of different cooling rates on thermomechanically processed high-strength rebar steel. Journal of Materials Processing Technology, 209(3), PP: 1565-1569, 2009. https://doi.org/10.1016/j.jmatprotec.2008.04.011.

DOI: 10.1016/j.jmatprotec.2008.04.011

[2] Ahmad M S. Effect of Sustained Elevated Temperature on Mechanical Behavior of Reinforcing Bar. Procedia Engineering, 173, PP: 905-909, 2017. https://doi.org/10.1016/j.proeng.2016.12.139.

DOI: 10.1016/j.proeng.2016.12.139

[3] Gardner L, Bu Y, Francis P, et al. Elevated temperature material properties of stainless steel reinforcing bar. Construction and Building Materials, 114, PP: 977-997, 2016. https://doi.org/10.1016/j.conbuildmat.2016.04.009.

DOI: 10.1016/j.conbuildmat.2016.04.009

[4] Xiao J, Hou Y, Huang Z. Beam test on bond behavior between high-grade rebar and high-strength concrete after elevated temperatures. Fire Safety Journal, 69, PP: 23-35, 2014. https://doi.org/10.1016/j.firesaf.2014.07.001.

DOI: 10.1016/j.firesaf.2014.07.001

[5] Li L J, Huo X D, Guo L. Strengthening Mechanisms of Vanadium Micro-Alloyed Reinforcing Steel Bar. Applied Mechanics and Materials, 130, PP: 942-945, 2011. https://doi.org/10.4028/www.scientific.net/AMM.130-134.942.

DOI: 10.4028/www.scientific.net/amm.130-134.942

[6] Lv Y K, Sheng G M, Huang Z H. High strain and low cycle fatigue behaviors of rebars produced by QST and V-N microalloying technology. Construction and Building Materials, 48, PP: 67-73, 2013. https://doi.org/10.1016/j.conbuildmat.2013.06.085.

DOI: 10.1016/j.conbuildmat.2013.06.085

[7] Lv Y K, Sheng G M, Jiao Y J. Effect of V/N ratio on the high strain and low cycle fatigue behaviors of V-N microalloyedrebars. Construction and Building Materials, 69, PP: 18-25, 2014. https://doi.org/10.1016/j.conbuildmat.2014.06.047.

DOI: 10.1016/j.conbuildmat.2014.06.047

[8] Wei J, Dong J H, Ke W. Corrosion resistant performance of a chemical quenched rebar in concrete. Construction and Building Materials, 25(3), PP: 1243-1247, 2011. https://doi.org/10.1016/ j.conbuildmat.2010.09.029.

DOI: 10.1016/j.conbuildmat.2010.09.029

[9] Wei J, Dong J H, Ke W. The influence of cooling processes on the corrosion performance of the rebar scale. Construction and Building Materials, 24(3), PP: 275-282, 2010. https://doi.org/10.1016/j.conbuildmat.2009.08.037.

DOI: 10.1016/j.conbuildmat.2009.08.037

[10] Ramesh S, Bhuvaneswari B, Palani G S, et al. Effects on corrosion resistance of rebar subjected to deep cryogenic treatment. Journal of Mechanical Science and Technology, 31(1), PP: 123-132, 2017. https://doi.org/10.1007/s12206-016-1211-5.

DOI: 10.1007/s12206-016-1211-5

[11] German M, Pamin J. FEM simulations of cracking in RC beams due to corrosion progress. Archives of Civil and Mechanical Engineering, 15(4), PP: 1160-1172, 2015. https://doi.org/ 10.1016/j.acme.2014.12.010.

DOI: 10.1016/j.acme.2014.12.010

[12] Das B, Bakkar A, Khutia N, et al. Low Cycle Fatigue Performance Evaluation of TMT rebar. Materials Today: Proceedings, 4(2), PP: 2554-2563, 2017. https://doi.org/10.1016/j.matpr. 2017.02.109.

DOI: 10.1016/j.matpr.2017.02.109

[13] Maksimov S, Bashkova J, Maksimova A. Modernization of Technology and Equipment for Glass Fiber Reinforced Plastic Rebar Production. Procedia Engineering, 206, PP: 1337-1341, 2017. https://doi.org/10.1016/j.proeng.2017.10.641.

DOI: 10.1016/j.proeng.2017.10.641

[14] Liu X, Su L, Liu X H. Effect of DROF process on the temperature field and roll force. Advanced Materials Research, 941-944, PP: 1885-1889, 2014. https://doi.org/10.4028/www.scientific.net/ AMR.941-944.1885.

DOI: 10.4028/www.scientific.net/amr.941-944.1885

[15] Liu X, Feng G H, Qi Y H. The Effect of Direct Rolling of Without-heating process on the Microstructure and Properties of a 400 MPa Rebar. IOP Conference Series: Materials Science and Engineering, 317(1), PP: 012003, 2018. https://doi.org /10.1088/1757-899x/317/1/012003.

DOI: 10.1088/1757-899x/317/1/012003