This study assesses the microstructure and mechanical properties of tungsten boride (WB) powder and cemented carbide coatings with WB additions. HVOF-sprayed layers produced from 60WC-30WB-10Co composite powders are compared with conventional 88WC-22Co and 86WC-10Co-4Cr coatings based on phase composition, hardness, wear resistance, and wear surface structure. The results indicate that Co reacts with WB during spraying, forming ternary phases (WCoB, W2CoB2) that increase hardness as well as sliding wear resistance.

hardness, high-velocity oxyfuel spraying, phase composition, tungsten boride reinforcement, WC-Co cermet coatings, wear resistance
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Copyright © 2016 DVS Media GmbH. All rights reserved.
2016
DVS Media GmbH
Topics
Boride ceramics High-velocity oxyfuel spray coating Wear resistance Hardness Sliding wear testing WC-Co cemented carbides
Issue Section:
Wear Protection
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