Tribological Behavior of Multi-layered WC-Co/MoS<sub>2</sub>-Ni Self-lubricating Coating Fabricated by Detonation Gun Spraying
The multilayered composite WC-Co/MoS<sub>2</sub>-Ni self-lubricating coatings were prepared by detonation gun spraying technology. The coating microstructure, element distribution, adhesive strength, and tribological properties were studied systematically. The results show that a little...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2017-03-01
|
| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2017/V45/I3/73 |
| Summary: | The multilayered composite WC-Co/MoS<sub>2</sub>-Ni self-lubricating coatings were prepared by detonation gun spraying technology. The coating microstructure, element distribution, adhesive strength, and tribological properties were studied systematically. The results show that a little of MoS<sub>2</sub> is oxidized and decomposed into gas of SO<sub>2</sub> during the high-temperature spraying process. The SO<sub>2</sub> left in the coating and can form into the micro porosities. The friction coefficient of the WC-Co coating first increases rapidly in the initial running-in phase, and then gradually increases slightly after entering into the steady-state phase; whereas the friction coefficient of multilayer composite coating steps in the steady-state phase soon and starts to decline gradually when the top WC-Co coating became perforated. By comparison, the coating cohesion declines slightly after adding the self-lubricating layer MoS<sub>2</sub>-Ni, but the friction coefficient decreases by about 40%, and the wear resistance is also improved slightly. |
|---|---|
| ISSN: | 1001-4381 1001-4381 |