Coating of 1.4404 stainless steel by a combination of brazing and nitriding

  • Ali Hussein Al-Azzawi Institute of Physical Metallurgy, Metalforming and Nanotechnology, University of Miskolc, Miskolc
  • Peter Baumli Institute of Physical Metallurgy, Metalforming and Nanotechnology, University of Miskolc, Miskolc
DOI: https://doi.org/10.30544/391
Keywords: Stainless steel 1.4404, Nickel alloy, Silicon, Brazing, Nitriding, Phase composition.

Abstract

In the current research, surface hardening of 1.4404 stainless steel was investigated. A hard Ni-containing coating was prepared by brazing at 1150 °C using a Ni foil with Si powder. The hardness behavior was increased by nitriding as well. The nitriding experiments were performed at low and high temperatures (460 and 640 °C) for a different period (3 and 6 h). The microstructure and material properties were characterized using scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and Micro Vickers hardness testing. Results show that the hard phase and the binding Ni foil were well distributed into the hard layer. The hard coating material was composed of a Si-phases and Ni-containing compound dispersion.

After the nitriding, the hardness of the samples was increased with increasing the nitriding time and temperature and increasing the brazing time. The 10 min brazing and 6h nitriding at 640°C resulted in 32% higher hardness than the non-nitride sample.

Strong metallurgical bonding is formed between the stainless steel substrate and the coating layer, as well as between the binding Ni foil and the hard phase; because of the mutual diffusion of alloying elements, the hardness of this hard coating was 2 to 3 times higher than the initial hardness of steel substrate.

Author Biography

Ali Hussein Al-Azzawi, Institute of Physical Metallurgy, Metalforming and Nanotechnology, University of Miskolc, Miskolc
Institute of Physical Metallurgy, Metal Forming and Nanotechnology

References

Xia Zhou, Guohui Qu, Jiyang Zhou, Xiwen Wang: Materials Processing Technology, 168 (2005) 280–285.

Crossreff

Al-Azzawi Ali, P. Baumli: Materials Science and Engineering, University of Miskolc HU, 40 (2015) 26-32.

LINK

American Welding Society (AWS) C3 Committee on Brazing and Soldering: Supersedes Brazing Handbook, 4th edition, Miami, USA, 1991, 86.

M. Ali, K.M. Knowles, P.M. Mallinson, J.A. Fernie: Acta Mater, 103 (2016) 859–869.

Crossreff

D.M. Jacobson, G. Humpston: Principles of Brazing, 1st edition, ASM International Ohio, USA, 2005, 32.

D. Liu, H.W. Niu, Y.H. Zhou, X.G. Song, D.Y. Tang, J.C. Feng: Materials and Design, 87 (2015) 42–48.

Crossreff

K. Wolski, V. Laporte: Materials Science and Engineering, A 495 (2008) 138-146.

Crossreff

H.R. Brooker, E.V. Beatson: Industrial Brazing, Welding and metal fabrication, Newnes-Butterworths, London, 2nd., 1975, 263.

Y.V. Naidich, V.S. Zhuravlev, I.I. Gab, B.D. Kostyuk, V.P. Krasovskyy, A.A. Adamovskyy, N.Yu. Taranets: European Ceramic Society, 28 (2008) 717–728

Crossreff

M. L. Muoloa, F. Valenza, F. Monteverde, N. Sobczak: J Acta Materialia, 57 (2009) 356-364.

Crossreff

M. L. Muolo, D. Passerone: Materials Science, 41 (2006) 5088–5098.

Crossreff

Y.V. Naidich, V.S. Zhuravlev, I.I. Gab, B.D. Kostyuk, V.P. Krasovskyy, A.A. Adamovskyy, N.Yu. Taranets: European Ceramic Society, 28 (2008) 717-728.

Crossreff

V. Bougiouri, R. Voytovych, O. Dezellus, N. Eustathopoulos: Materials Science, 42 (2016) 2016–2023.

Crossreff

N. Saunders, A. P. Miodownik: CALPHAD Calculation of Phase Diagrams: A Comprehensive Guide Pergamon, Guildford, UK, 1st edition, 1998, 478.

C. Kim, M. Dayananda: Metallurgical and Materials Transactions, A 15 (1984) 649-659.

Crossreff

Published
2018-10-19
Issue
Vol 24 No 3 (2018)
Section
Research

Copyright (c) 2018 Ali Hussein Al-Azzawi

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms: 

  • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  • Authors are permitted and encouraged to post their published articles online (e.g., in institutional repositories or on their website, social networks like ResearchGate or Academia), as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

 

Creative Commons License
Except where otherwise noted, the content on this site is licensed under a Creative Commons Attribution 4.0 International License.