An experimental investigation followed by a comparative study of HVOF sprayed WC-12Co, WC- 10Co4Cr and Cr₃C₂-25NiCr coatings were conducted at three different loads of 20, 40 and 60 N. Sliding wear of coated specimens against hardened EN-32 disc was performed as per the G 99–5 standard at room temperature. The feedstock powders and corresponding coatings were characterized for microstructural studies along with porosity, microhardness, and adhesive bond strength. The experimental results suggest that the stability of the transfer layer plays a significant role in stable wear. The WC-12Co coating shows the best sliding wear resistance, maximum microhardness which was found to be 56.6% and 9.6% higher than WC-10Co-4Cr and Cr₃C₂-25NiCr coatings. The maximum adhesive bond strength was found to be 2.03% and 10.5% higher in WC-12Co than WC-10Co-4Cr and Cr₃C₂-25NiCr. Tribo oxide layer counterbalances to stabilize the wear during high heat generation at higher loads. Various aspects and mechanisms of these improvements are discussed in this paper.

在20、40和60 N的三种不同载荷下进行了HVOF喷涂的WC-12Co，WC-10Co 4Cr和Cr ₃ C ₂ -25NiCr涂层的实验研究，然后进行了对比研究。在室温下，按照G 99-5标准进行了32盘测试。对原料粉末和相应的涂层以及孔隙率，显微硬度和粘接强度进行了表征，以进行微观结构研究。实验结果表明，转移层的稳定性在稳定磨损中起着重要作用。WC-12Co涂层显示出最佳的滑动耐磨性，最大显微硬度比WC-10Co-4Cr和Cr ₃ C ₂高出56.6％和9.6％。-25NiCr涂层。发现在WC-12Co中，最大粘合剂粘结强度比WC-10Co-4Cr和Cr ₃ C ₂ -25NiCr高2.03％和10.5％。摩擦氧化层平衡以稳定较高负载下高热量产生期间的磨损。本文讨论了这些改进的各个方面和机制。