Advertisement

Metal Science and Heat Treatment

, Volume 60, Issue 9–10, pp 602–605 | Cite as

Effect of Two-Stage Austenitization on Microstructure and Microhardness of Austenitic-Ferritic Cast Iron

  • Kai ZhaoEmail author
  • Yueyue Jiang
Article
  • 21 Downloads

Comparative analysis of the microstructure and microhardness of austenitic-ferritic high-strength iron after heat treatments involving single-stage and double-stage quenching from the austenitic or intercritical temperature ranges and tempering is performed with the use of dilatometry, measurement of microhardness, and optical and scanning electron microscopy. The possibility of the use of two-stage austenitization for heat treatment of austenitic-ferritic cast irons for raising their properties is studied.

Key words

austenitic-ferritic high-strength cast irons heat treatment microhardness dilatometry 

Notes

The first author would like to address many thanks to students for some experiments. The work has been supported by Basic Science and Advanced Technology Research of Chongqing cstc2016jcyjA0608.

References

  1. 1.
    M. A. Yescas and H. K. D. H. Bhadeshia, “Model for the maximum fraction of retained austenite in austempered ductile cast iron,” Mater. Sci. Eng. A, 333, 60 – 65 (2002).CrossRefGoogle Scholar
  2. 2.
    S. Morgenbrodt, L. Spieß, G. Teichert, et al., “Comparative investigation on the determination of the austenite content in bainitic cast iron (ADI),” Metal. Sci. Heat Treat., 67, 393 – 401 (2012).Google Scholar
  3. 3.
    J. Yang and S. K. Putatunda, “Near threshold fatigue crack growth behavior of austempered ductile cast iron (ADI) processed by a novel two-step austempering process,” Mater Sci. Eng. A, 393, 254 – 268 (2005).CrossRefGoogle Scholar
  4. 4.
    C. Valdes, M. Figueroa, and L. E. Ramirez, “Austempered ductile iron with dual matrix structures,” Revista Mixicana De Fisica, 55, 51 – 58 (2009).Google Scholar
  5. 5.
    J. Yang and S. K. Putatunda, “Improvement in strength and toughness of austempered ductile cast iron by a novel two-step austempering process,” Mater. Des., 25, 219 – 230 (2004).CrossRefGoogle Scholar
  6. 6.
    G. Francucci, J. Sikora, and R. Dommarco, “Abrasion resistance of ductile iron austempered by the two-step process,” Mater. Sci. Eng. A, 485, 46 – 54 (2008).CrossRefGoogle Scholar
  7. 7.
    A. Basso, M. Caldera, M. Chapetti, et al., “Mechanical properties of dual phase austempered ductile iron,” ISIJ Int., 50, 302 – 306 (2010).CrossRefGoogle Scholar
  8. 8.
    P. Dhanapal and S. S. M. Nazirudeen, “A study of the structure and properties of high-strength bainite-carbide cast iron with globular graphite,” Metal. Sci. Heat Treat., 53, 578 – 583 (2012).CrossRefGoogle Scholar
  9. 9.
    W. D. Cao and X. P. Lu, “Duplex treatment of high-strength steels,” Metall. Mater. Trans. A, 20, 1687 – 1699 (1989).CrossRefGoogle Scholar
  10. 10.
    J. Liu, H. Yu, T. Zhou, et al., “Effect of double quenching and tempering heat treatment on the microstructure and mechanical properties of a novel 5Cr steel processed by electro-slag casting,” Mater. Sci. Eng. A, 619, 212 – 220 (2014).CrossRefGoogle Scholar
  11. 11.
    T. Karthikeyan, V. T. Paul, S. Saroja, et al., “Grain refinement to improve impact toughness of 9Cr – 1Mo steel through a double austenitization treatment,” J. Nucl. Mater., 419, 256 – 262 (2011).CrossRefGoogle Scholar
  12. 12.
    S. K. Putatunda and P. K. Gadicherla, “Effect of austempering time on mechanical properties of a low manganese austempered ductile iron,” J. Mater. Eng. Perform., 9, 193 – 203 (2000).CrossRefGoogle Scholar
  13. 13.
    H. Kahn, G. M. Michal, F. Ernst, et al., “Effects on x-ray diffraction patterns in low-temperature-carburized austenitic stainless steel,” Metall. Mater. Trans. A, 40, 1799 – 1804 (2009).CrossRefGoogle Scholar
  14. 14.
    T. S. Hummelshoj, T. L. Christiansen, and M. A. J. Somers, “Lattice expansion of carbon-stabilized expanded austenite,” Scr. Mater., 63, 761 – 763 (2010).CrossRefGoogle Scholar
  15. 15.
    M. Delia, M. Alaalam, and M. Grech, “Effect of austenitizing condition on the impact properties of an alloyed austempered ductile iron of initially ferritic matrix structure,” J. Mater. Eng. Perform., 7, 265 – 272 (1998).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Metallurgical and Materials EngineeringChongqing University of Science and TechnologyChongqingChina

Personalised recommendations