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Open AccessArticle

Microstructures and Wear Resistance of FeCoCrNi-Mo High Entropy Alloy/Diamond Composite Coatings by High Speed Laser Cladding

1
Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
2
College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
*
Authors to whom correspondence should be addressed.
Coatings 2020, 10(3), 300; https://doi.org/10.3390/coatings10030300
Received: 14 February 2020 / Revised: 19 March 2020 / Accepted: 20 March 2020 / Published: 24 March 2020
(This article belongs to the Special Issue Surface Treatment by Laser-Assisted Techniques)
FeCoCrNi-Mo high entropy alloy/diamond composite coatings were successfully prepared by high speed laser cladding. A high scanning speed was adopted (>30 mm/s), and the effects of laser power, scanning speed, and diamond content on the microstructure and wear resistance of the composite coating were studied. The processing parameters of laser cladding had significant influence on the dilution ratio, graphitization of diamond, and wear resistance of the composite coatings. When the laser cladding parameters were 3000 W of laser power and the high scanning speed of 50 mm/s, the composite coating exhibited a uniform microstructure, the lowest dilution ratio, and the best wear resistance. The wear resistance of the composite coating was enhanced with the addition of diamond, but microcracks also increased. When the amount of diamond was 15 wt.%, the best combination of microstructures and wear resistance was obtained. View Full-Text
Keywords: laser cladding; diamond composite coating; high entropy alloy; high scanning speed; wear resistance laser cladding; diamond composite coating; high entropy alloy; high scanning speed; wear resistance
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Wang, H.; Zhang, W.; Peng, Y.; Zhang, M.; Liu, S.; Liu, Y. Microstructures and Wear Resistance of FeCoCrNi-Mo High Entropy Alloy/Diamond Composite Coatings by High Speed Laser Cladding. Coatings 2020, 10, 300.

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