About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technology 2026: Advancement in Energy Materials - Theory, Simulation, Characterization, Application
|
| Presentation Title |
Effect of laser power on the microstructural evolution and tribological properties of laser cladding Co-based self-lubricating coating |
| Author(s) |
Fengqin Ji |
| On-Site Speaker (Planned) |
Fengqin Ji |
| Abstract Scope |
To improve the wear resistance of 300 M steel, Co-based WC reinforced graphite self-lubricating coatings were successfully fabricated by laser cladding with different laser power. The effects on microstructure and tribological properties were investigated. The results show that the phase composition of two coatings consists mainly of γ-Co, WC, Cr23C6, CrCo and graphite. With the increase of laser power, the eutectic Cr23C6 structure at the grain boundaries in the upper region is denser. The middle region changes from tightly arranged cellular crystals to cellular crystals and dendrites, and more columnar dendrites with larger sizes appear in the lower region. The 1000 W coating has the lowest average friction coefficient of 0.331 under 60 N load, and the lowest wear rate of 5.145×10-5 mm3/N⋅m under 30 N load. The wear mechanisms of all two coatings are three-body abrasive wear and adhesive wear, accompanied by slight oxidation wear. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Thin Films and Interfaces |