Abstract
The thermo-mechanical controlled processing (TMCP) with accelerated cooling (ACC) has been used to manufacture steel plates with high yield strength and high impact toughness with the following chemistry: 0.08% C; 1.56% Mn; 0.043% Nb; 0.016% Ti; 0.17% Cr. Innovative TMCP regimes were employed with minimum amounts of micro-alloying elements. viz., Nb and Ti to enhance yield strength with high impact toughness. The phenomenon of precipitation hardening and grain refinement was used to improve yield strength and high Charpy Impact energy with enhancement of toughness values. High yield strength (510–550 MPa) and Charpy Impact energy for toughness (189–230 J at 0 °C and 185–226 J at −20 °C) were obtained. It was noted that high cumulative reductions in last three finishing passes (≥ 65%) played a critical role in a further increase in yield strength and Charpy Impact energy (248–262 at 0 °C, 242–254 at − 20 °C). The grain refinement of ferrite, as revealed in optical micrographs, due to very high reduction in finishing passes particularly at low finishing temperature, was favourable for additional improvement in yield strength and toughness values. EBSD maps showed more prominently that plates having more than 65% cumulative reductions in last three finishing passes developed deformation induced ferrite.
Similar content being viewed by others
References
Matsubara H, Osuka T, Kozasu I, and Tsukada K, Tetsu-to-Hagane 58 (1972) 1848.
Tsukada K, Matsumoto K, and Hirabe K, Iron Steel Maker July (1982) 21.
Zhao M C, Yang K, and Shan Y, Mater Sci Eng 335A (2002) 14.
Kong J H, Zhen L, Guo B, Li P, Wang A, and Xie C, Mater Des 25 (2004) 723.
Craven A J, He K, Garvie L A J, and Baker T N, Acta Mater 48 (2000) 3857.
Dutta B, and Sellars C M, Mater Sci Technol 3 (1987) 197.
Elwazri A M, Yue S, and Wanjara P, Metall Mater Trans A 36 (2005) 2297.
Yuan S Q, Liang G L, and Zhang X J, J Iron Steel Res 17 (2010) 60.
Gong P, Palmiere E J, and Rainforth W M, Acta Mater 97 (2015) 392. https://doi.org/10.1016/j.actamat.2015.06.057.
Klinkenberg C, and Hensger K-E, Mater Sci Forum 500–501 (2005) 253. https://doi.org/10.4028/www.scientific.net/MSF.500-501.253.
Yang X, Salem M, and Palmiere E J, Mater Manuf Process 25 (2010) 48.
Sun X, Liu Q, and Dong H, DIFT and Grain Refinement in Low Carbon Steel, CISRI, Beijing.
Ning Z, Cai Q, Xie B, and Dong E, Mater Sci Technol 33 (2017) 1215. https://doi.org/10.1080/02670836.2016.1275450.
Yada H, Li C M, and Yamagata H, ISIJ Int 40 (2000) 200.
Sun Z Q, Yang W Y, Ji Q Q, and Hu A M, Mater Sci Eng A334 (2002) 201.
Weng Y, Sun X, and Dong H, Iron Steel 40 (2005) 9.
Tamura I, Ouchi C, Tanaka T, and Sekine H, Thermomechanical Processing of High Strength Low Alloy Steels, Butterworth & Co. Ltd (1988).
Beynon J H, Gloss R, and Hodgson P D, Mater Forum 16 (1992) 37.
Lee S, Kwon D, Lee Y K, and Kwon O, Metall Mater Trans A 26A (1995) 1093.
Choo W Y, Lee J S, Lee C S, and Choi J K, CAMP ISIJ 13 (2000) 1144.
Shin S Y, Hwang B, Lee S, Kima N J, and Ahnc S S, Mater Sci Eng A 458 (2007) 281.
Acknowledgements
The authors are thankful to the managements of Rourkela Steel Plant (RSP) and Research and Development Centre for Iron and Steel (RDCIS), Steel Authority of India Limited (SAIL), National Institute of Technology, Rourkela-8 for their encouragement and support during execution of the work presented above.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Kumar, P., Maity, K.P., Dasgupta, A. et al. Innovations in Thermo-mechanical Processing to Develop High Strength Steel Plates. Trans Indian Inst Met 75, 2069–2076 (2022). https://doi.org/10.1007/s12666-022-02577-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12666-022-02577-7