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Journal of Materials Engineering and Performance

, Volume 27, Issue 4, pp 1792–1802 | Cite as

Development of an Austenitization Kinetics Model for 22MnB5 Steel

  • M. Di Ciano
  • N. Field
  • M. A. Wells
  • K. J. Daun
Article
  • 134 Downloads

Abstract

This paper presents a first-order austenitization kinetics model for 22MnB5 steel, commonly used in hot forming die quenching. Model parameters are derived from constant heating rate dilatometry measurements. Vickers hardness measurements made on coupons that were quenched at intermediate stages of the process were used to verify the model, and the Ac1 and Ac3 temperatures inferred from dilatometry are consistent with correlations found in the literature. The austenitization model was extended to consider non-constant heating rates typical of industrial furnaces and again showed reasonable agreement between predictions and measurements. Finally, the model is used to predict latent heat evolution during industrial heating and is shown to be consistent with values inferred from thermocouple measurements of furnace-heated 22MnB5 coupons reported in the literature.

Keywords

austenite dilatometry ferrous alloy hardness measurement phase transformation 

Notes

Acknowledgments

This research was carried out under the National Science and Engineering Research Council Automotive Partnerships Canada (NSERC-APC 447344-12). The authors would like to thank Mr. Cyrus Yao (Promatek Research Centre) and Mr. Ron Soldaat (Arcelor-Mittal) for their assistance and material support.

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Copyright information

© ASM International 2018

Authors and Affiliations

  • M. Di Ciano
    • 1
  • N. Field
    • 1
  • M. A. Wells
    • 1
  • K. J. Daun
    • 1
  1. 1.Department of Mechanical and Mechatronics EngineeringUniversity of WaterlooWaterlooCanada

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