A Study on Microstructure, Texture and Precipitation Evolution at Different Stages of Steel Processing in Interstitial Free High Strength Steels

  • Gaurav Bhargava
  • Latimuni Patra
  • Shrikant Pai
  • Devasish Mishra
Technical Paper
  • 77 Downloads

Abstract

The formability characteristics of interstitial free high strength (IFHS) steels are significantly governed by processing parameters of steel at consecutive processing stages, chiefly hot rolling of slabs followed by cold reduction of hot rolled coils and finally annealing treatment of cold reduced coils. The present work focuses on investigating the steel processing parameters for a chosen set of processing parameters which in turn influence the final formability of the steel. The underlying objective is to study the effect of steel processing parameters, which in turn favorably control texture, microstructure, precipitate morphology and its distribution at each step to impart desired properties in the steel sheet in the end. In the current work, an IFHS steel chemistry is chosen with an objective to evaluate the contribution of texture, microstructure and precipitates generated at each processing step to the formability in relation with the chosen processing parameters.

Keywords

Interstitial free high strength steel Formability Microstructure Texture Precipitate 

Abbreviations

IFHS

Interstitial free steel

RD

Rolling direction

ND

Normal direction

TD

Transverse direction

El%

Elongation percentage

r-Bar

Mean plastic strain ratio

Δr

Plastic anisotropy ratio

HR

Hot rolling (process/coil)

CR

Cold rolling (process/coil)

SRT

Slab reheating temperature

RDT

Roughing deformation temperature

CT

Coiling temperature

LHF

Ladle reheating furnace

RH

Ruhrstahl–Heraeus degasser

References

  1. 1.
    Capdevila I, Toda F G, Caballero C, Garcia-Mateo C, and de Andres CG, Mater Sci Technol 28 (2012) 321.CrossRefGoogle Scholar
  2. 2.
    Kundu A, ISIJ Int 54 (2014) 677.CrossRefGoogle Scholar
  3. 3.
    Lissel L, Modeling the Microstructural Evolution during Hot Working of C–Mn and of Nb microalloyed Steels using a Physically Based Model, Sweden (2008).Google Scholar
  4. 4.
    Ray R K, and Ghosh P, Mater Sci Forum 702–703 (2011) 34.CrossRefGoogle Scholar
  5. 5.
    Butrón-Guillén M P, and Jonas J J, ISIJ Int 36 (1996) 68–73.CrossRefGoogle Scholar
  6. 6.
    Ferry M, Yu D, and Chandra T, ISIJ Int 41 (2001) 882.CrossRefGoogle Scholar
  7. 7.
    Verlinden B, Driver J, Samajdar I, and Doherty R D, Thermomechanical Processing of Metallic Materials. Pergamon Materials Series. Elsevier, Oxford (2007).Google Scholar
  8. 8.
    Castruita Ávila L G, Garcia Pastor F, and de Castro Román M J, Matéria (Rio de Janeiro) 20 (2015) 714–721.Google Scholar
  9. 9.
    Maruma M G, Siyasiya C W, and Stumpf W E, J South Afr Inst Min Metall 113 (2013) 115–120.Google Scholar
  10. 10.
    Banerjee K, Physical Metallurgy and Drawability of Extra Deep Drawing and Interstitial Free Steels. Intech, Rijeka, Croatia (2012). doi: 10.5772/35073.
  11. 11.
    Nave M D, ISIJ Int 44 (2004) 187.CrossRefGoogle Scholar
  12. 12.
    Haldar A, Suwas S, and Bhattacharjee D, (eds) Microstructure texture in Steels. Springer-Verlag, London (2009).Google Scholar

Copyright information

© The Indian Institute of Metals - IIM 2017

Authors and Affiliations

  1. 1.JSW Steel Limited, Vijayanagar WorksToranagalluIndia

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