This work use the D-gun system to spray the WC-17Co coating. analyzed the microstructure and performance of the coating by SEM, EDAX, XRD, HAXD. It gave a basis for the next research work for the anti-wear coating on aluminum alloy. The hardness of the WC-17Co coating is about HV1100~1300, the average porosity less than 1%. And the max diameter of the single hole is less than 0.012mm. There are no apparent oxide in the coating. The WC particles occurred decarburization during the spraying process and deposited the coating that composed with W2C and Co3W3C phases. The corrosion resistance of the coating is more ideal. But the phase distribution in the coating is not enough uniform.
In aluminum alloy chemical plating process, temperature is one of the most important factors which directly affect the coating speed and quality. With the change of temperature with speed, so temperature is an important factor which affect the deposition speed. Therefore, to measure and study the influence on temperature to the quality of coating and plating speed is of important theoretical and practical significance. Using scanning electron observe the surface morphology of coating. Spectrum analyzer detects the surface content of Ni- P; then corrosion resistance of coating is detected, and thus the optimum temperature is determined.
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