期刊
SURFACE ENGINEERING
卷 33, 期 11, 页码 857-865出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670844.2017.1323442
关键词
Nanoparticles; microstructure; tungsten carbide; wear resistance
资金
- CONACYT (Consejo Nacional de Ciencia y Tecnologia)
Mixtures of Ni-based filler metal without and with 0.5, 1, and 2% WC nanoparticles (NPs) were methodologically tested in order to improve the wear behaviour of WC/Ni-based overlays deposited on low carbon steel by the plasma transferred arc (PTA) process. On adding 2% WC NPs, the longitudinal direction overlay microstructure was modified to have a fibrous appearance. The mechanism to improve WC particle distribution and thus prevent microcrack propagation in the overlays implies a liquid-phase viscosity change. Results of pin-on-disk tests in the overlay using filler metal with 2% WC NPs show that the combined effect of fibrous microstructure and W-rich phases in the overlay, decreases the volume loss by 76% and 78% in comparison with overlays without WC NPs for a 1 and 5N load, respectively. These outcomes might be of interest for the mining industry, where machinery and equipment are exposed to extreme wear conditions.
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