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Laser Quenching of Ionic Nitrided Steel: Effect of Process Parameters on Microstructure and Optimization

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Abstract

The surface properties of 40CrMnMo7 steel have been increased by ionic nitriding thermo chemical treatment followed by laser quenching. Nitriding treatment increases the wear resistance and decreases the wear coefficient, guaranteeing an uniform, though shallow, hardening depth. Combining nitriding with laser quenching has been shown to increase of the hardening depth, while retaining the advantages obtained by the first treatment. In this work the effect of laser quenching parameters on microstructure and mechanical properties of 40CrMnMo7 steel have been investigated and predictive models developed suitable for further optimization of the process. DoE has been exploited to reduce the number of experiments and for evaluating by statistic methods the optimized process parameters.

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Authors and Affiliations

  1. Department of Engineering (DIEF), University of Modena and Reggio Emilia, Via Vignolese 905/A, 41125, Modena, Italy

    E. Colombini (Post Doc), R. Sola (Assistant Professor), P. Veronesi (Associate Professor) & G. Poli (Full Professor)

  2. Stav, Barberino del Mugello, Italy

    G. Parigi (Technical Director)

Authors
  1. E. Colombini
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  2. R. Sola
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  3. G. Parigi
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  4. P. Veronesi
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  5. G. Poli
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Corresponding author

Correspondence to E. Colombini.

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Manuscript submitted February 18, 2014.

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Colombini, E., Sola, R., Parigi, G. et al. Laser Quenching of Ionic Nitrided Steel: Effect of Process Parameters on Microstructure and Optimization. Metall Mater Trans A 45, 5562–5573 (2014). https://doi.org/10.1007/s11661-014-2490-z

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  • DOI: https://doi.org/10.1007/s11661-014-2490-z

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