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Metallography, Microstructure, and Analysis

, Volume 6, Issue 6, pp 591–597 | Cite as

Pearlite Development in Commercial Hadfield Steel by Means of Isothermal Reactions

  • M. Martín
  • M. Raposo
  • O. Prat
  • M. F. Giordana
  • J. Malarría
Technical Article
  • 70 Downloads

Abstract

The Fe–12Mn–1C Hadfield steel is an abrasion-resistant alloy of high technological relevance for mining and heavy machinery. This composition is susceptible to pearlite formation which is detrimental for the material’s ductility. Although its spread use, the study of pearlite formation has been preserved to laboratory conditions which cannot be transferred to industrial practices. This manuscript provides updated information about this phenomenon by constructing the time–temperature-transformation diagram of the alloy between 400 and 600 °C. The pearlitic reaction occurs above 450 °C and begins on the grain boundaries. Only 7 min is needed for the transformation to start at 550 °C, and a maximum pearlite fraction of 35% is reached after 150 min at this temperature. Results are compared with the Fe–12Mn–0.8C composition mostly found in literature. The discussion comprises the effects of carbon and manganese content on the pearlitic reaction with the support of thermodynamics calculations.

Keywords

Hadfield steel Isothermal reaction Pearlite TTT-diagram Thermodynamics 

Notes

Acknowledgments

The authors acknowledge the support of CONICET, Argentina, under Grants PIP 0488 and PDTS-251.

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Copyright information

© Springer Science+Business Media, LLC and ASM International 2017

Authors and Affiliations

  1. 1.Institute of Physics Rosario CONICET-UNRRosarioArgentina
  2. 2.Materials Engineering DepartmentUniversidad de ConcepciónConcepciónChile

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