Wear-Resistant WC Composite Hard Coatings by Brazing
A wear-resistant tungsten carbide/copper (WC/Cu) brazing alloy coating was deposited onto a steel substrate by high-temperature furnace brazing. Compared with other hard surfacing processes, much larger WC particles could be used to make a metal layer with higher wear resistance. ASTM G-65 wear test results for the brazed composite coating showed a higher wear resistance when compared with some WC-Co hard coatings that are commonly used. In this paper, the brazing alloy, the brazing process, and the after-brazing heat treatment are studied. The microstructure of the brazing alloy and the as-deposited coating were characterized, and no significant porosity was found. A good metallurgical bond was formed at the WC/Cu alloy interface and at the composite coating/substrate interface. Little or no dilution was observed. The bond strength between the Cu alloy and substrate is also much higher than for a thermal spray coating.
J. Bao et al., "Wear-Resistant WC Composite Hard Coatings by Brazing," Journal of Materials Engineering and Performance, vol. 13, no. 4, pp. 385-388, Springer Verlag, Jan 2004.
The definitive version is available at http://dx.doi.org/10.1361/10599490419874
Materials Science and Engineering
Keywords and Phrases
Copper Brazing Alloy; Furnace Brazing; Tungsten Carbide; Wear-Resistant Coating
Article - Journal
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