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Metal Science and Heat Treatment

, Volume 56, Issue 7–8, pp 434–439 | Cite as

A Thermodynamic and Experimental Study of Low-Alloy Steels After Carbonitriding in a Low-Pressure Atmosphere

  • T. Marray
  • P. Jacquet
  • M. Mansori
  • A. Fabre
  • L. Barrallier
Article
  • 119 Downloads

The effect of the composition of two steels (B and 6MnCr5) on precipitation of undesirable phases (carbides, nitrides and carbonitrides) under thermochemical treatment (low-pressure or vacuum carbonitriding) is investigated. Metallographic and x-ray diffraction studies and thermodynamic computations are performed.

Key words

carbonitriding in low-pressure atmospheres vacuum carbonitriding carbides carbonitrides alloy steel 

Notes

The authors are sincerely grateful to the BMI Fours Industriels, St. Quentin Fallavier, France, for the help rendered and for the financial support.

References

  1. 1.
    G. F. Bocchini, “Overview of surface treatment methods for PM parts,” Adv. Powder Metall. & Partic. Mater., 6, 56 – 87 (2001).Google Scholar
  2. 2.
    Metals Handbook, Heat Treating, ASM Int. (1991), Vol. 4.Google Scholar
  3. 3.
    H. Ferguson, “Heat treatment of ferrous powder metallurgy parts,” in: Powder Metal Technologies and Applications, A Handbook, ASM Int., Metals Park (1998), Vol. 7, pp. 645 – 655.Google Scholar
  4. 4.
    P. F. Stratton and L. Sproge, “Gaseous carburizing and carbonitriding: the basics,” Heat Treat. Met., 31(3), 65 – 68 (2004).Google Scholar
  5. 5.
    A. Goldsteinas, “New vacuum processes achieve mechanical property improvement in gearbox components,” Gear Technol., 24(6), 34 – 39 (2007).Google Scholar
  6. 6.
    W. Grafen, O. Irretier, and M. Rink, “Applications of low-pressure carburization with high temperatures (1000°C to 1050°C) in industrial practice,” Heat Treat. Met., 62(3), 97 – 102 (2007).Google Scholar
  7. 7.
    S. Kremel, H. Danninger, H. Altena, and Y. Yu, “Low-pressure carburizing of sintered alloy steels with varying porosity,” Powder Metall. Progr., 4(3), 119 – 131 (2004).Google Scholar
  8. 8.
    D. Ghiglione, C. Leroux, and C. Tournier, “Nitruration, nitrucarburation et derives,” in: Pratique des Traitements Thermochimiques, Editions Techniques de l’Ingénieur, Association Technique de Traitement Thermique (ATTT), [M 1 227] (1996).Google Scholar
  9. 9.
    D. H. Herring and J. C. St. Pierre, “Vacuum carburizing of P/M steels,” Annual Powder Metallurgy Conference Proc., 43, 525 – 537 (1987).Google Scholar
  10. 10.
    H. Altena and F. Schrank, “Low-pressure carbonitriding using acetylene and ammonia – a novel diffusion process for casehardening,” Heat Treat. Met., 58(4), 204 – 210 (2003).Google Scholar
  11. 11.
    P. Jacquet, D. R. Rousse, G. Berdard, and M. Lambertin, “A novel technique to monitor carburizing processes,” Mater. Chem. Phys., 77, 542 – 551 (2002).CrossRefGoogle Scholar
  12. 12.
    K. Kawata and S. Asai, “Atmosphere control during low-pressure carbonitriding processes,” in: 17th Int. Fed. for Heat Treat. and Surface Eng. Congr. (2008), pp. 327 – 330.Google Scholar
  13. 13.
    J. Slycke, “Carbonitriding – an investigation from the process point of view,” Thèse, Linköping Studies in Science and Technology, Dissertation No. 37 (1979).Google Scholar
  14. 14.
    E. Gianotti, “Algorithm for carbon diffusion computation in a vacuum furnace,” Heat Treat. Progr., 2, 27 – 30 (2002).Google Scholar
  15. 15.
    J. Goldstein and A. Moren, “Diffusion modeling of the carburization process,” Metall. Mater. Trans. A, 9(11), 1515 – 1525 (1978).CrossRefGoogle Scholar
  16. 16.
    R. Gorockiewicz, “The kinetics of low-pressure carburizing of alloy steels,” Vacuum, 86(4), 448 – 451 (2011).CrossRefGoogle Scholar
  17. 17.
    M. Jung, S. Oh, and Y. Lee, “Predictive model for the carbon concentration profile of vacuum carburized steels with acetylene,” Metals Mater. Int., 15(6), 971 – 975 (2009).CrossRefGoogle Scholar
  18. 18.
    T. Marray, “Carbonitruration basse pression d’aciers et de pièces obtenues par la Technologie MIM,” in: Thèse Arts et Mètiers ParisTech, ENAM-0056 (2012), 143 p.Google Scholar
  19. 19.
    H. Berns and A. Fischer, “Microstructure of Fe – Cr – C hardfacing alloys with additions of Nb, Ti and B,” Mater. Charact., 39, 499 – 527 (1997).CrossRefGoogle Scholar
  20. 20.
    L. Lu, H. Soda, and A. McLean, “Structural materials: properties, microstructure and processing,” Mater. Sci. Eng. A, 347, 214 – 222 (2003).CrossRefGoogle Scholar
  21. 21.
    T. Marray, P. Jacquet, D. Checot, and F. Fabre, “Carbonitriding treatment applied to PIM elaborated parts,” in: Proc. World PM2010 Conf., 10 – 14 October 2010, Florence, Italy (2010), Vol. 2, pp. 489 – 494.Google Scholar
  22. 22.
    S. D. Carpenter and D. Carpenter, “X-ray diffraction study of M7C3 carbide within high chromium white iron,” Mater. Lett., 57, 4456 – 4459 (2003).CrossRefGoogle Scholar
  23. 23.
    G. N. Laird and G. L. F. Powell, “Solidification and solid state transformation mechanisms in Si alloyed high-chromium white cast irons,” Metall. Trans. A, 24, 981 – 988 (1993).CrossRefGoogle Scholar
  24. 24.
    X. Wu and G. Chen, “Microstructural features of an iron-based laser coating,” J. Mater. Sci., 34, 3355 – 3361 (1999).CrossRefGoogle Scholar
  25. 25.
    J. T. H. Pearce and D. W. L. Elwell, “Duplex nature of eutectic carbides in heat-treated 30% chromium cast iron,” J. Mater. Sci. Lett., 5, 1063 – 1064 (1986).CrossRefGoogle Scholar
  26. 26.
    S. Buytoz, “Microstructural properties of M7C3 eutectic carbides in a Fe – Cr – C alloy,” Mater. Lett., 60, 605 – 608 (2006).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • T. Marray
    • 1
    • 2
  • P. Jacquet
    • 1
    • 3
  • M. Mansori
    • 4
  • A. Fabre
    • 2
  • L. Barrallier
    • 2
  1. 1.Laboratoire de Science des Matériaux, ECAMLyonFrance
  2. 2.Arts et Métiers ParisTech, MSMPAix en ProvenceFrance
  3. 3.Arts et Métiers ParisTech, LaBoMaPClunyFrance
  4. 4.Laboratoire de Chimie des Matériaux et EvironnementUniversité Cadi AyyadMarrakechMaroc

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