改善硬质电镀铬层特征网纹结构的方法及研究进展

Methods and Research Progress in Improving the Characteristic Mesh Structure of Hard Chromium Plating Layer

电镀铬层因具有较高的硬度以及较低的摩擦系数,常用于提高零部件耐磨性以延长产品使用寿命,但因其特殊的网纹结构带来的气密性低以及耐蚀性差等不利影响,限制了镀铬层的使用范围。就如何改善铬层网纹结构的方法以及研究现状进行了总结及分析,综述了前处理、电镀液成分、电镀参数、添加剂及柔性技术等影响铬层网纹结构的因素;采用滚压、金刚石超精碾压及封孔技术等后处理改善网纹结构的方法在解决实际工程化问题的应用情况;以及利用共沉积技术制备网纹复合铬层和将激光表面织构技术引入对镀铬层网纹微结构设计等方面的研究进展。

Due to its high hardness and low friction coefficient,hard chromium plating layer is commonly utilized to enhance the wear resist-ance of mechanical components,thereby prolonging their service life.However,the unique mesh structure of these layers detrimentally impacts air tightness and corrosion resistance,limiting their application scope.In this paper,methodology and current research for improving this mesh structure were comprehensively analyzed and summarized.The mesh structure of the chromium layer,which was affected by factors such as pre-treatment,composition of electroplating solution,plating parameters,additives and flexible technology,was reviewed.The application of post-processing methods such as rolling,diamond ultra precision rolling and hole sealing,to improve the mesh structure in solving practical engi-neering problems was reviewed.The research progress on the preparation of reticulated composite chromium layers using co-deposition technolo-gy and the introduction of laser surface texture technology for the design of mesh microstructure of chromium plating layers was reviewed.