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THE INFLUENCE OF TECHNOLOGICAL PARAMETERS OF LASER SURFACING ON THE PROPERTIES OF NiCrBSiC-WC COMPOSITES

https://doi.org/10.32362/2410-6593-2018-13-4-58-66

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Abstract

It was investigated the influence of technological parameters of laser cladding on the thickness of the carbide composite coatings with similar composition and properties of matrix and different types of reinforcing inclusions (spherical tungsten carbides (WC) and recycled carbides). Special attention is paid to physical-mechanical and service properties of the composites such as hardness and resistance to abrasive wear. It is established that the thickness of the carbide composite coatings increases with increasing laser power and flow rate of the carrier gas, and with decreasing speed of the laser and the step of cladding. The study showed that at the addition of 50 wt.% WC matrix has smaller hardness values 540-560 HV, which allows to obtain the structure of the carbide composite coatings without cracks. At the same time, at addition of 80 wt.% WC matrix has higher hardness 670 HV, which does not provide the structure without cracks. Resistance of composites NiCrBSiC-WC to cracking, as well as their wear resistance, increases with increasing content of tungsten carbide. The wear resistance of the coatings received from powder Technicord 655-SL, with a reinforcement by recycled carbide, comparable to that for coatings from spherical tungsten carbide Tekmat WC-125. Coatings NiCrBSiCWC, obtained by laser cladding, are used to increase the service life of the equipment telemetering systems, in particular, it is possible to prevent of abrasion and provide of increasing the service life of the contact pads of the equipment for measurement while drilling.

About the Authors

A. E. Zatoka
Technology Center “Tekhnikord” Ltd
Russian Federation

Ph.D. (Eng.), Director, T

259-a, Oktyabr'skiy Pr., Lyubertsy 140000, Russia



D. V. Drobot
MIREA - Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)
Russian Federation

D.Sc. (Chem.), Professor, K.A. Bolshakov Chair of Chemistry and Technology of Rare and Scattered Elements, Nanoscale and Composite Materials

86, Vernadskogo Pr., Moscow 119571, Russia



S. P. Merchev
"Technological Systems of Protective Coatings” Ltd
Russian Federation

Deputy General Director

19, Simferopol shosse, Shcherbinka, Moscow 108851, Russia



S. V. Nevezhin
“Technologies of Surface Modification” Ltd.
Russian Federation

Ph.D. (Eng.), Deputy General Director

3, 1st Vishnevaya st., Astrakhan 414000, Russia



A. S. Gerasimov
National University of Science and Technology “MISiS”
Russian Federation

Research Scientist

4, Leninsky Pr., Moscow 19991, Russia



D. А. Ronzhin
MIREA - Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)
Russian Federation

Graduate Student, K.A. Bolshakov Chair of Chemistry and Technology of Rare and Scattered Elements, Nanoscale and Composite Materials

86, Vernadskogo Pr., Moscow 119571, Russia



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For citation:


Zatoka A.E., Drobot D.V., Merchev S.P., Nevezhin S.V., Gerasimov A.S., Ronzhin D.А. THE INFLUENCE OF TECHNOLOGICAL PARAMETERS OF LASER SURFACING ON THE PROPERTIES OF NiCrBSiC-WC COMPOSITES. Fine Chemical Technologies. 2018;13(4):58-66. (In Russ.) https://doi.org/10.32362/2410-6593-2018-13-4-58-66

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ISSN 2410-6593 (Print)
ISSN 2686-7575 (Online)