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," Proceedings of the 22nd Heat Treating Society Conference and the 2nd International Surface Engineering Congress, pp. 592-596, ASM International, Sep 2003.
The definitive version is available at http://dx.doi.org/10.1361/10599490419874
22nd Heat Treating Society Conference and the 2nd International Surface Engineering Congress (2003: Sep. 15-17, Indianaoplis, IN)
Materials Science and Engineering
International Standard Serial Number (ISSN)
Article - Conference proceedings
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