Cr-modified nano-diamond wear-resistant coating

A preparation method of the Cr-modified nano-diamond wear-resistant coating comprises the following steps: calcining the modified diamond nano-particles; preparing a chromium electroplating solution by utilizing the obtained modified diamond particles; and electroplating on a metal substrate by adopting the prepared electroplating solution to form the wear-resistant coating. The content of diamond in the plating layer formed according to the method is greatly increased, so that the loss rate of the nano-diamond is reduced, and the strength of the plating layer is enhanced. Therefore, the cost can be remarkably reduced, and the service life of used parts can be prolonged. Cr-改性纳米金刚石耐磨镀层，其制备方法包括：煅烧改性金刚石纳米颗粒；利用所得改性金刚石颗粒配置电镀铬溶液；以及采用上述配置的电镀溶液在金属基底上电镀形成耐磨镀层。根据本发明所形成的镀层中金刚石的含量大幅提高，从而降低了纳米金刚石的损失率，增强了镀层的强度。本发明因此能够显著降低成本，延长使用部件的寿命。