The Effect of Thickness on the Properties of Laser-Deposited NiBSi-WC Coating on a Cu-Cr-Zr Substrate†
by
Yury Korobov 1,2,*, Yulia Khudorozhkova 3
, Holger Hillig 4, Alexander Vopneruk 5, Aleksandr Kotelnikov 5, Sergey Burov 6, Prabu Balu 7, Alexey Makarov 2,8,9 and Alexey Chernov 1
Yury Korobov 1,2,*, Yulia Khudorozhkova 3, Holger Hillig 4, Alexander Vopneruk 5, Aleksandr Kotelnikov 5, Sergey Burov 6, Prabu Balu 7, Alexey Makarov 2,8,9 and Alexey Chernov 1
1
Laboratory of Laser&Plasma Treatment, M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620002, Russia
2
Department of Welding Production Technologies, Ural Federal University, Ekaterinburg 620002, Russia
3
Laboratory of Technical Diagnostics, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620049, Russia
4
Thermal Surface Technology unit, Fraunhofer IWS, Dresden 01277, Germany
5
Research Unit, R&D Enterprise Mashprom, JSC, Ekaterinburg 620012, Russia
6
Department of Structural Materials Science, Institute of Engineering Science of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620049, Russia
7
Research Unit, COHERENT Inc. 5100 Patrick Henry Dr, Santa Clara, CA 95054, USA
8
Laboratory of Mechanical Properties, M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620108, Russia
9
Laboratory of Materials Science, Institute of Engineering Science of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620049, Russia
*
Author to whom correspondence should be addressed.
†
This paper is an extended version from our paper, Korobov, Y.; Vopneruk, A.; Kotelnikov, A.; Khudorozhkova, Y.; Burov, S.; Balu, P. Structure analysis of laser deposited NiBSi-WC coatings on a Cu-Cr-Zr substrate. In Proceedings of the the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures, Tomsk, Russia 9–13 October 2017; https://doi.org/10.1063/1.5013779.
Photonics 2019, 6(4), 127; https://doi.org/10.3390/photonics6040127
Received: 22 October 2019 / Revised: 9 December 2019 / Accepted: 9 December 2019 / Published: 13 December 2019
(This article belongs to the Special Issue Advanced Optical Materials and Devices)
Ni/60WC coatings on copper substrate were placed via laser deposition (LD). A structural study was conducted using electron microscopy and a microhardness evaluation. Two body abrasive wear tests were conducted with a pin-on-plate reciprocating technique. A tool steel X12MF GOST 5960 (C-Cr-Mo-V 1.6-12-0.5-0.2) with a hardness of 63 HRC was used as a counterpart. The following results were obtained: Precipitation of the secondary carbides takes place in the thicker layers. Their hardness is lower than that of the primary carbides in the deposition (2425 HV vs. 2757 HV) because they mix with the matrix material. In the thin layers, precipitation is restricted due to a higher cooling rate. For both LD coatings, the carbide’s hardness increases compared to the initial mono-tungsten carbide (WC)-containing powder (2756 HV vs. 2200 HV). Such a high level of microhardness reflects the combined influence of a low level of thermal destruction of carbides during laser deposition and the formation of a boride-strengthening phase from the matrix powder. The thicker layer showed a higher wear resistance; weight loss was 20% lower. The changes in the thickness of the laser deposited Ni-WC coating altered its structure and wear resistance.
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Keywords:
laser deposition; NiBSi-WC coating; copper; wear
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MDPI and ACS Style
Korobov, Y.; Khudorozhkova, Y.; Hillig, H.; Vopneruk, A.; Kotelnikov, A.; Burov, S.; Balu, P.; Makarov, A.; Chernov, A. The Effect of Thickness on the Properties of Laser-Deposited NiBSi-WC Coating on a Cu-Cr-Zr Substrate. Photonics 2019, 6, 127.
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