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Study on laser-alloyed self-lubricating anti-wear composite coating after ageing treatment
Authors:S-J Qiao  Y-J Zhai  G-Y Fu  G-X Zhu  Y-G Wang
Affiliation:1. School of Mechanical &2. Electric Engineering, Soochow University, 178 East Ganjiang Road, Suzhou 215006, PR China
Abstract:The NiCr/Cr3C2-10CaF2 (wt-%) composite coatings were fabricated on Ti-6Al-4V alloy by laser surface alloying. Ageing treatments were performed at 600°C for 0, 24, 48 and 96?h, respectively. Microstructure and tribological properties of the as-laser-alloyed and aged composite coatings were investigated systematically. Results showed that microstructure became more homogeneous after ageing at 600°C for 48?h. Wear rates and friction coefficients of the aged composite coatings were slightly higher than that of the as-laser-alloyed coating. It indicates that microstructure and tribological properties of the composite coatings present good high-temperature stability.
Keywords:Composite materials  Coating  Ageing treatment  Tribology and wear  High-temperature stability
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