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Trends in Mechanical Engineering & Technology

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

  1. Kunal Bhansali
  2. A. J. Keche
  3. C. L. Gogte
  4. Vivek Bagul

Abstract

Modern rolling process introduces manufacturing of reinforcement bar in combination of continuouscasting 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 iscarried out. This modernized rolling process overcomes reheating losses and cost of transportationand of course cost of reheating which were faced in previous manufacturing processes. During therolling, forces such as compression and tension provided by rolls at each stage results plasticdeformation of material. There forces deform the grains into smaller size with elongated grainssequentially at every stage resulting fine grain size at final stage of rolling. This paper analyses thecomparison of two different rolling inputs as (Continuous Casting Machine) CCM rolled billet andreheat rolled billet with the properties of reinforcement bar (rebar) with respect to grain size andhardness at different stages of manufacturing. It has been found that the cooling (quenching) requiredto produce the same grade as CCM rolled rebar is less for RHF rolled rebar. Using same processparameters for both cases, RHF rebar provides more yield as compared to CCM rebar withoutaffecting ductility.

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