IN SITU SYNTHESIZED (TIB+TIC)/TI COMPOSITE LAYERS FABRICATED ON CP-TITANIUM BY ELECTRON BEAM CLADDING

1 LENIVTSEVA Olga
Co-authors:
2 GOLKOVSKI Mikhail 1 OGNEVA Tatyana 1 CHUCHKOVA Lyubov 1 MATS Olga
Institutions:
1 Novosibirsk State Technical University, Novosibirsk, Russia
2 Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1355-1360
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
21 views / 8 downloads
Abstract

In the present study, the method of non-vacuum electron beam cladding of powder mixtures containing 10, 20 and 30 wt. % of boron carbide, titanium and welding fluxes (CaF2, LiF) was used for the synthesis of titanium carbide and titanium boride particles. The structure, phase composition, microhardness and tribotechnical properties of the samples of commercially pure titanium after surfacing were investigated. The thickness of the obtained coatings was 1.4 ... 1.7 mm. The main phases of the cladded layers were alpha-titanium, titanium carbide with a cubic lattice of TiC (B1), titanium monoboride with an orthorhombic lattice TiB (B27). The obtained data were confirmed by the results of the microstructural analysis. The microstructure of the coatings consisted of hardening titanium carbide and titanium boride particles distributed in the titanium matrix. All coatings contained 0.2-0.89 vol. % of undissolved boron carbide particles. The factor, which was determined the microhardness and tribotechnical properties of the obtained materials, was the hardening particles content in the coatings. The average microhardness value of the coatings was 395, 521 and 565 HV at 10, 20 and 30 wt. % B4C, respectively. The friction test against fixed abrasive particles exhibited that the relative wear resistance of the coating formed by cladding of 30 wt. % B4C was three times higher compared to commercially pure titanium.

Keywords: Titanium, electron beam cladding, titanium carbide, titanium boride, wear resistance
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