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To improve the surface properties of Ti alloy, (Co34Fe8Cr29Ni8Si7)100–<italic>x</italic> B<italic>x</italic> alloy, coatings were prepared by laser cladding. The coatings—mainly composed of TiCr, Fe0.1Ti0.18V0.72, CoTi, Ti2Ni, and TiB—and amorphous phases were investigated in terms of microstructure, wear resistance, and corrosion resistance. The results showed that the microhardness of the Co-based coatings first increased and then decreased with the increase of B content. When the B content was 6%, the microhardness of the coating increased up to 1210 HV0.2 which was 3.4 times that of TC4 alloy substrate. The coatings exhibited diverse wear mechanisms that gradually transitioned from severe fatigue spalling and oxidative wear to slightly abrasive wear. The corrosion current density of Co-based coatings in 3.5 wt% NaCl solution first increased and then decreased as B contents increased. Coatings with 4% B content, however, exhibited the best corrosion resistance, which was most suitable for improving the corrosion resistance of Ti alloy.
</abstract>

To improve the surface properties of Ti alloy, (Co34Fe8Cr29Ni8Si7)100–x Bx alloy, coatings were prepared by laser cladding. The coatings—mainly composed of TiCr, Fe0.1Ti0.18V0.72, CoTi, Ti2Ni, and TiB—and amorphous phases were investigated in terms of microstructure, wear resistance, and corrosion resistance. The results showed that the microhardness of the Co-based coatings first increased and then decreased with the increase of B content. When the B content was 6%, the microhardness of the coating increased up to 1210 HV0.2 which was 3.4 times that of TC4 alloy substrate. The coatings exhibited diverse wear mechanisms that gradually transitioned from severe fatigue spalling and oxidative wear to slightly abrasive wear. The corrosion current density of Co-based coatings in 3.5 wt% NaCl solution first increased and then decreased as B contents increased. Coatings with 4% B content, however, exhibited the best corrosion resistance, which was most suitable for improving the corrosion resistance of Ti alloy.

Effects of B content on wear and corrosion resistance of laser-cladded Co-based alloy coatings

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

To improve the surface properties of Ti alloy, (Co34Fe8Cr29Ni8Si7)100–x Bx alloy, coatings were prepared by laser cladding. The coatings—mainly composed of...

Effects of B content on wear and corrosion resistance of laser-cladded Co-based alloy coatings

Publicado en línea: 02 abr 2024

Páginas: 13 - 23

Recibido: 11 dic 2023

Aceptado: 25 ene 2024

DOI: https://doi.org/10.2478/msp-2023-0040

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© 2023 Rong Xia et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.