Abstract
A novel CrCx/C-Cr multilayer coating for cotton picking spindles was prepared on a 20CrMnTi substrate using PVD technology. Compared to the traditional electroplated chromium coating, the CrCx/C-Cr coating has a dense structure, and no micro-cracks were observed on the surface. The results of nanoindentation show that the nano-hardness of the CrCx/C-Cr coating is about 8.46 GPa, which is 78.5% higher than that of the substrate. Additionally, the CrCx/C-Cr coating has a lower friction coefficient and wear rate compared to the electroplated chromium coating, indicating better wear resistance properties. The multilayer CrCx/C-Cr coating is expected to replace the high-pollution chromium coating for cotton picking spindles.
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