Abstract
This article describes microstructure control aimed for wear-resistance improvement of Co-based (Co-Cr-W-B-Si) self-fluxing alloy coating by diffusion treatment. The diffusion treatments of thermally sprayed Co-based self-fluxing alloy coating on steel substrate were carried out at 1370-1450 K for 600-6000 s under an Ar gas atmosphere. Microstructural variations of the coating and the interface between the substrate and the coating were investigated in detail. A proper diffusion treatment precipitates two kinds of fine compounds in Co-based matrix. X-ray diffractometer (XRD) and electron probe microanalyzer (EPMA) analysis revealed these precipitates to be a chromium boride dissolving cobalt and a tungsten boride containing cobalt and chromium. The size of each precipitate became larger with increasing treatment temperature and time. A coating with the proper size borides showed a superior wear-resistance.
| Original language | English |
|---|---|
| Pages | 991-997 |
| Number of pages | 7 |
| Publication status | Published - 2007 |
| Event | 2007 International Thermal Spray Conference on Thermal Spray 2007: Global Coating Solutions - Beijing, China Duration: May 14 2007 → May 16 2007 |
Other
| Other | 2007 International Thermal Spray Conference on Thermal Spray 2007: Global Coating Solutions |
|---|---|
| Country/Territory | China |
| City | Beijing |
| Period | 5/14/07 → 5/16/07 |
All Science Journal Classification (ASJC) codes
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry