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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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Study on laser-alloyed self-lubricating anti-wear composite coating after ageing treatment

Abstract

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