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- W2936163144 abstract "The microstructure, hardness, and wear behaviors of a High Velocity Oxygen Fuel(HVOF) sprayed WC-CoFe coating are comparatively investigated before and after laser heat treatments of the coating surface. During the spraying, the binder metal is melted and a small portion of WC is decomposed to W2C. A porous coating is formed by evolution of carbon oxide gases formed by the reaction of the free carbon and the sprayed oxygen gas. The laser heat treatment eliminates the porosity and provides a more densified microstructure. After laser heat treatment, the porosity in the coating layer decreases from 1.7% to 1.2 and the coating thickness decreases from 150 μm to 100 μm. The surface hardness increases from 1440 Hv to 1117 Hv. In the wear test, the friction coefficient of coating decreases from 0.45 to 0.32 and the wear resistance is improved by the laser heat treatment. The improvement is likely due to the formation of oxide tribofilms." @default.
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- W2936163144 date "2019-01-01" @default.
- W2936163144 modified "2023-10-18" @default.
- W2936163144 title "Effect of Laser Heat-treatment on WC-CoFe Coated Surface by HVOF" @default.
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- W2936163144 doi "https://doi.org/10.3740/mrsk.2019.29.1.52" @default.
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