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

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

Open Access
|Apr 2024

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.

DOI: https://doi.org/10.2478/msp-2023-0040 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
Language: English
Page range: 13 - 23
Submitted on: Dec 11, 2023
Accepted on: Jan 25, 2024
Published on: Apr 2, 2024
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2024 Rong Xia, Kun Zhang, Fengyuan Shu, Xin Zhang, Liying Yan, Cheng Li, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.