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Characteristics and Comparison of Continuous Casting Machine (CCM) and Reheat Furnace (RHF) Rolled Reinforcement Bar

Kunal Bhansali, A. J. Keche, C. L. Gogte, Vivek Bagul


Modern rolling process introduces manufacturing of reinforcement bar in combination of continuous
casting and straight rolling to avoid time and cost losses and produce fine quality reinforcement bar.
Using the core heat or heat inside the raw material (generally known as billet), the rolling process is
carried out. This modernized rolling process overcomes reheating losses and cost of transportation
and of course cost of reheating which were faced in previous manufacturing processes. During the
rolling, forces such as compression and tension provided by rolls at each stage results plastic
deformation of material. There forces deform the grains into smaller size with elongated grains
sequentially at every stage resulting fine grain size at final stage of rolling. This paper analyses the
comparison of two different rolling inputs as (Continuous Casting Machine) CCM rolled billet and
reheat rolled billet with the properties of reinforcement bar (rebar) with respect to grain size and
hardness at different stages of manufacturing. It has been found that the cooling (quenching) required
to produce the same grade as CCM rolled rebar is less for RHF rolled rebar. Using same process
parameters for both cases, RHF rebar provides more yield as compared to CCM rebar without
affecting ductility.


Rebar, reduction, reheating, grain size, hardness

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Bhansali K, Keche AJ, Gogte CL, Chopra S. Effect of grain size on Hall-Petch relationship during rolling process of reinforcement bar. Mater Today Proc. 2020;26:3173–8. doi: 10.1016/j.matpr.2020.02.655.

Solanki V, Mukhopadhyay G. Metallurgical analysis of transverse crack of rebars. Eng Fail Anal. 2019;104:1143–56. doi: 10.1016/j.engfailanal.2019.06.058.

Bhadeshia H. New bainitic steels by design, Modelling and simulation for materials design. National Research Institute for Metals; 1998. p. 227–32.

Bhansali K, Keche AJ, Gogte CL, Chopra S. Effect of grain size on Hall-Petch relationship during rolling process of reinforcement bar. Mater Today Proc. 2020;26:3173–8. doi: 10.1016/j.matpr.2020.02.655.

Song Y, Yeon J, Na B. Numerical simulations of the hall–Petch relationship in aluminium using gradient-enhanced plasticity model. Adv Civ Eng. 2019;2019:1–9. doi: 10.1155/2019/7356581.

Yoshida S, Ikeuchi T, Bhattacharjee T, Bai Y, Shibata A, Tsuji N. Effect of elemental combination on friction stress and Hall-Petch relationship in face-centered cubic high/medium entropy alloys. Acta Mater. 2019;171:201–15. doi: 10.1016/j.actamat.2019.04.017.

Hurley PJ, Muddle BC, Hodgson PD. Nucleation sites for ultrafine ferrite produced by deformation of austenite during single-pass strip rolling. Metall Mater Trans A. 2001;32(6):1507–17. doi: 10.1007/s11661–001–0238-z.

Mabuchi H, Hasegawa T, Ishikawa T. Metallurgical features of steel plates with ultra fine grains in surface layers and their formation mechanism. ISIJ Int. 1999;39(5):477–85. doi: 10.2355/isijinternational.39.477.

Hidaka H, Tsuchiyama T, Takaki S. Relation between microstructure and hardness in Fe-C alloys with ultra fine grained structure. Scr Mater. 2001;44(8–9):1503–6. doi: 10.1016/S1359–6462(01)00714-X.

Khan AQ. The effect of morphology on the strength of copper-based martensites; 1972.

Baumeister T, Sadegh AM. Marks. standard handbook for mechanical engineers. New York: McGraw-Hill; 1978.

Bhadeshia HK. New bainitic steels by design. Modell Simul Mater Des. 1998:227–32.

Bhadeshia H. Bainite in steels: transformations, microstructures and properties. 2nd ed. London: University of Cambridge; 2001.

Bhadeshia H. Interpretation of the microstructure of steels; 2019. Available from:

Bhadeshia HKDH. Martensite and bainite in steels: transformation mechanism & mechanical properties. J Phys IV France. 1997;07(C5):C5–367. doi: 10.1051/jp4:1997558.

Bhadeshia HKDH. 52nd Hatfield Memorial Lecture Large chunks of very strong steel. Mater Sci Technol. 2005;21(11):1293–302. doi: 10.1179/174328405X63999.

Zainab R, ASTM E. standard test methods for Rockwell hardness of low carbon steel material. American Society for Testing and Materials; 2019.

ASTM E 112. Standard test methods for determining average grain size. West Conshohocken, PA: American Society for Testing and Materials; 2013.

ASTM E1382. Standard test methods for determining average grain size using semiautomatic and automatic image analysis. American Society for Testing and Materials; 1997 (Reapproved; 2015).

ASTM E. Standard guide for preparation of metallographic specimens. American Society for Testing and Materials.


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