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Metallurgical and Materials Transactions A

, Volume 50, Issue 5, pp 2259–2271 | Cite as

Investigation of Peritectic Behavior of Steel Using a Thermal Analysis Technique

  • Sunday AbrahamEmail author
  • Rick Bodnar
  • Johan Lonnqvist
  • Fatemeh Shahbazian
  • Anders Lagerstedt
  • Magnus Andersson
Article
  • 56 Downloads

Abstract

During solidification, the peritectic reaction can occur in a wide range of materials, including ferrous and non-ferrous alloys. The kinetic and thermodynamic principles that govern the peritectic reaction in regard to solute diffusion and phase transformation are well understood, and the negative impact that the peritectic reaction has on the surface quality of as-cast steel products is well documented. In ferroalloys, the peritectic reaction occurs between the hypoperitectic (0.09 pct C) and hyperperitectic (0.53 pct C) regions of the iron-carbon phase diagram. Beside the carbon content, the magnitude of the peritectic reaction in a given steel is affected by the contents of other solute elements. However, our understanding of the effect of all dissolved elements on the peritectic reaction is still evolving. There are over a dozen equations that have been proposed for predicting the peritectic nature of steels. Some of these equations were developed for application to specific groups of steels, chemistries, and casting conditions. In this paper, the predictive power of four peritectic equations is compared to the results from thermal analysis experiments conducted on steels with varying concentrations of dissolved elements. Based on the thermal analysis results, an equation is proposed for calculating the latent heat of the peritectic reaction for a given solute element.

Notes

Acknowledgments

The authors would like to thank Steve Hansen and other SSAB senior managers for supporting this project. Special thanks to Miles Haberkorn and Josh Cottrell for their assistance in this work.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  • Sunday Abraham
    • 1
    Email author
  • Rick Bodnar
    • 1
  • Johan Lonnqvist
    • 2
  • Fatemeh Shahbazian
    • 2
  • Anders Lagerstedt
    • 3
  • Magnus Andersson
    • 3
  1. 1.SSAB AmericasMuscatineUSA
  2. 2.SwerimKistaSweden
  3. 3.SSAB Oxelösund ABOxelösundSweden

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