EVALUATION OF DLC COATING FOR PARTS OF WEAPONS AND MILITARY EQUIPMENT

1 HEGR Eduard
Co-authors:
2 STUDENY Zbynek 3 NGUYEN Huu Chien 3 PROCHAZKA Jiri 3 ADAM Jan
Institutions:
1 Brno University of Technology, Czech Republic, EU, +420 734 366 134, eduard.hegr@seznam.cz
2 University of Defence in Brno, Czech Republic, EU, +420 973 44 2604, zbynek.studeny@unob.cz
3 University of Defence in Brno, Faculty of Military Technology, Czech Republic, EU
Conference:
29th International Conference on Metallurgy and Materials, Brno, Czech Republic, EU, May 20 - 22, 2020
Proceedings:
Proceedings 29th International Conference on Metallurgy and Materials
Pages:
632-641
ISBN:
978-80-87294-97-0
ISSN:
2694-9296
Published:
27th July 2020
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
726 views / 565 downloads
Abstract

The article deals with tribological evaluation of DLC coating. This coating is deposited on a material which, due to its mechanical properties, is suitable for components of weapons and military equipment. The results of the Department of Engineering of the Faculty of Military Technology of the University of Defense in Brno in the field of plasma nitriding are used in this work. Plasma nitriding technology has been found to have a positive effect on the performance of components operating under extreme conditions. One of the significant surface changes is the increase in surface hardness. Further increases wear resistance and corrosion resistance. By setting the parameters of plasma nitriding technology appropriately, fatigue life can be increased.Deposition of the DLC coating by PVD technology on a tempered or plasma nitrided surface results in qualitative changes on the surface of the component. Evaluation of tribological properties such as coefficient of friction or wear coefficient can be verified by adjusting surface treatment technologies to specific applications, eg in armaments production.The paper presents the results of tribological properties of the surface of the DLC coating deposited on substrate of the heat-treated steel 42CrMo4. The comparison was done with the deposition of a DLC coating on the surface substrate of a steel 42CrMo4 that has been plasma nitrided, like a duplex system. Tribological properties such as friction coefficient and wear coefficient were measured by a Tribolab UMT-3 equipment. Tribological tests such as Scratch test and Ball on Disc were performed on this device.

Keywords: DLC coating, Scratch test, Ball on Disc, components of weapons

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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