WC-Co coating with nanolevel surface finish is required in some special components in aviation, automobile and forming industries. In this study, compliant finishing of WC based coating is carried out using an in-house fabricated wheel based SAG tool. Theory of contact mechanics and the interactions of active abrasive particles with the workpiece surface are considered to develop a material removal rate (MRR) model. The brittle-to-ductile transition of WC-Co coating is investigated during compliant finishing with diamond abrasive pads having different particle size. It is observed that the material is purely removed through ductile mode when 6 μm polishing pad is used and the critical chip thickness for brittle to ductile transition lies in the range of 60–100 nm. Moreover, the lower wheel compression and higher wheel speed can slightly enhance the possibility of ductile machining. A low surface roughness of 21 nm is achieved using multistep compliant finishing operations with decreasing abrasive particle size in a sequence. The residual stress of the finished coating is found to be −78 ± 8 MPa which is almost 28% of the ground surface. The cross-section of the finished coating is analysed and no appreciable sub-surface damage is detected.

航空、汽车和成型行业的一些特殊部件需要具有纳米级表面光洁度的WC-Co涂层。在这项研究中，WC 基涂层的顺从精加工是使用内部制造的基于车轮的 SAG 工具进行的。接触力学理论和活性磨料颗粒与工件表面的相互作用被认为可以开发材料去除率 (MRR) 模型。在使用具有不同粒度的金刚石磨料垫进行柔顺精加工期间，研究了 WC-Co 涂层的脆性到韧性转变。据观察，当使用 6 μm 抛光垫时，材料完全通过延性模式去除，脆性到延性转变的临界芯片厚度在 60-100 nm 范围内。而且，较低的砂轮压缩和较高的砂轮速度可以略微增强韧性加工的可能性。21 nm 的低表面粗糙度是通过使用多步顺从精加工操作实现的，并按顺序减小磨料粒度。发现成品涂层的残余应力为 -78 ± 8 MPa，几乎占地面的 28%。对成品涂层的横截面进行分析，未检测到明显的亚表面损伤。