Abstract
WC-CoCr composite coatings in bimodal and conventional structures were deposited by high velocity oxy-fuel (HVOF), respectively. The microstructure, microhardness, and fracture toughness of the coatings with different WC particle size distributions were studied, the coating abrasive wear characteristics were carried out by dry-sand rubber wheel abrasion tester, and the wear failure mechanisms of the coatings were investigated. The results show that, the bimodal structure coating fabricated by the powder containing 30wt% ultrafine WC particles demonstrates the most dissolution of WC in binder during deposition and the lowest coating fracture toughness. However, the bimodal structure coating fabricated by the powder containing 50wt% ultrafine WC particles combines the least porosity, the greatest microhardness and fracture toughness, and the most superior wear resistance.
| Original language | English |
|---|---|
| Pages (from-to) | 118-127 |
| Number of pages | 10 |
| Journal | Fenmo Yejin Jishu/Powder Metallurgy Technology |
| Volume | 35 |
| Issue number | 2 |
| Publication status | Published - 27 Apr 2017 |
| Externally published | Yes |
Keywords
- Abrasive wear
- Bimodal
- Coatings
- High velocity oxy-fuel