Abstract
Plasma nitriding of tool materials is common practice to improve the wear resistance and lifetime of tools. Machining-induced compressive residual stresses in shallow layers of some tenths of microns are observed accompanied by other characteristic properties of machined surfaces in these high-strength materials. After plasma nitriding of M2 high-speed steel, previously induced compressive residual stresses remain stable and the depth of diffusion layers decreases with increasing compressive residual stresses. This article reports investigations of plasma nitrided samples with different levels of residual stresses induced prior to the nitriding process. For comparison, experiments with bending load stresses during plasma nitriding have also been carried out. The plasma nitriding treatment was performed at constant temperature of 500 °C with a gas mixture of 5 vol pct N2 in hydrogen. Nitriding time was varied from 30 to 120 minutes. All samples were characterized before and after plasma nitriding concerning microstructure, roughness, microhardness, chemical composition, and residual stress states. Experimental results are compared with analytical calculations on (residual) stress effects in diffusion and show a clear effect of residual and load stresses in the diffusion of nitrogen in a high-strength M2 tool steel.
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References
J.R. Davis: ASM Handbook, 10th ed., ASM, Metals Park, OH, 1991, vol. 4, pp. 420–24.
R. Grün and H.J. Günther: Mater. Sci. Eng., 1991, vol. A140, pp. 435–41.
B. Edenhofer and T.J. Bewley: Heat Treatment, 1976, vol. 9, pp. 7–13.
D. Günther, T. Hirsch, F. Hoffmann, and P. Mayr: Härterei-Technische Mitteilungen, 1998, vol. 53, pp. 203–10.
A. da Silva Rocha, T.R. Strohaecker, V. Tomala, and T. Hirsch: Surface Coatings Technol., 1999, vol. 115, pp. 24–31.
A. da Silva Rocha, T.R. Strohaecker, and T. Hirsch: Surface Coatings Technol., 2003, vol. 165, pp. 176–85.
S.R. Bradbury, D.B. Lewis, and M. Sarwar: Surface Coatings Technol., 1996, vol. 85, pp. 215–20.
D.B. Lewis, S.R. Bradbury, and M. Sarwar: Surface Coatings Technol., 1996, vol. 82, pp. 187–92.
E.J. Mittemeijer and M.A.J. Somers: Härterei Technische Mitteilungen, 1992, vol. 47, pp.175–82.
H. Oettel and G. Schreiber: AWT-Tagungsband “Nitrieren und Nitrocarburieren,” AWT, Wiesbaden, Germany, 1991, pp. 139–51.
U. Kreft, F. Hoffmann, T. Hirsch, and P. Mayr: in Surface Modification Technologies VIII, T.S. Sudarshan and M. Jeandin, The Institute of Materials, London, 1995, pp. 148–60.
D. Günther, F. Hoffmann, and T. Hirsch: Härterei-Technische Mitteilungen, 2003, vol. 58, pp. 64–73.
J.F. Gu, D.H. Bei, J.S. Pan, J. Lu, and K. Lu: Mater. Lett., 2002, vol. 55, pp. 340–43.
H. Ferkel, M. Glatzer, Y. Estrin, and R.Z. Valiev: Scripta Mater., 2002, vol. 46, pp. 623–28.
F. Hoffmann: Ph.D. Thesis, University of Bremen, Bremen, Germany.
R.E. Smallman: Modern Physical Metallurgy, 2nd ed., Butterworth and Co., London 1963, pp. 111–12.
R.E. Reed-Hill: Physical Metallurgy Principles, 2nd ed., PWS-Kent Publ. Co., Boston, MA, 1992, pp. 433–42.
P.M. Unterweiser: Heat Treaters Guide: Practices and Procedures for Irons and Steels, 2nd ed. ASM, Metals Park, OH, 1989, p. 904.
F. Dornelles Ramos: Master’s Thesis, UFRGS, Porto Alegre, Brazil, 2003.
E. Rose and P. Mayr: Mikrochim. Acta, 1989, vol. I, pp. 197–212.
Z. Weiss and K. Marshall: Thin Solid Films, 1997, vols. 308–309, pp. 382–88.
V. Hauk: Structural and Residual Stress Analysis by Nondestructive Methods: Evaluation, Application, Assessment, Elsevier, Amsterdam, 1997, pp. 388–92.
H.C.F. Rozendaal: Ph.D. Thesis, University of Delft, Delft, The Netherlands, 1985.
S. Mridha and D. Jack: Met. Sci., 1982, vol. 16, pp. S.398-S.404.
D. Scott: Treatise on Materials Science and Technology, vol. 13, Wear, Academic Press, New York, NY, 1979, pp. 449–51.
J. Philibert: Les Editions de Physique, Les Ulis, Cedex A, France, 1991, p. 110.
A. Köthe and F. Schlät: Diffusion in Metallischen Werkstoffen, VEB Verlag, Leipzig, 1970, p. 116.
C.G. Homan and J.F. Cox: in Physics and Solids at High Compressives, C.T. Tomizuka and R.M. Emrick, eds., Academic Press, London, 1965, pp. 374–77.
A. Gude, K. Freitag, B. Sepiol, G. Vogl, and H. Mehrer: Physica Status Solidi B-Basic Res., 1996, vol. 197, pp. 299–307.
J.K. Baria, P.N. Gajjar, and A.R. Jani: on-line paper 20, Sept. 2003, via http://fizika.hfd.hr/fizika a/av03/a12p023.pdf
L.S. Dubrovinsky, S.K. Saxena, N.D. Dubrovinskaia, and T. LeBihan: Am. Mineralogist, 2000, vol. 85, pp. 386–89.
H. Klümper-Westkamp: Ph.D. Thesis, University of Bremen, Bremen, Germany, 1989.
P.J. Wilbur, J.A. Davis, R. Wie, J.J. Vaja, and D.L. Williamson: Surface Coatings Technol., 1996, vol. 83, pp. 250–56.
R. Trejo-Luna, L. Cota, L. Martinez, L. Morales, and J. Richards: Scripta Metall., 1985, vol. 19, pp. 1297–1300.
E.J. Mittemeijer: Härterei Technische Mitteilungen, 1981, vol. 36, pp. 45–70.
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Hirsch, T.K., Rocha, A.D.S., Ramos, F.D. et al. Residual stress-affected diffusion during plasma nitriding of tool steels. Metall Mater Trans A 35, 3523–3530 (2004). https://doi.org/10.1007/s11661-004-0189-2
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DOI: https://doi.org/10.1007/s11661-004-0189-2