In this study, carbide-metal composite coatings (WC-10Co4Cr) were prepared via high-velocity oxygen-fuel (HVOF) spraying, and the influence of Mo₂C addition on the microstructure, mechanical properties, and wear performance was systematically investigated. The results indicate that Mo₂C is solid-soluted in WC during the preparation process, which induces lattice distortion. Mo₂C addition results in refinement of the grain size of WC particles, homogenization of the binder phase distribution, and reduction of the porosity of the coatings. An appropriate amount of Mo₂C addition significantly enhances coating performance. The coating containing 2 wt.% Mo₂C exhibited optimal properties. It demonstrated the highest microhardness and the lowest porosity, and wear tests revealed it had the lowest friction coefficient and wear rate at room temperature, which is primarily due to enhanced hardness and density that effectively suppressed abrasive wear. At 400 °C, the coating with 2 wt.% Mo₂C addition also showed the most stable and lowest friction coefficient. The generated Mo-containing oxides acts as a solid lubricant, isolating friction surfaces and mitigating both oxidative and adhesive wear. However, excessive Mo₂C content leads to an abnormal increase in the volume fraction of the binder phase, accompanied by reduced hardness. This induces a transition of the wear mechanism toward adhesive wear dominance, with complex nonlinear evolution characteristics.

TiC-based cermets are promising candidates for marine wear-resistant components; however, achieving a balance between mechanical performance, erosion–corrosion resistance, and binder cost remains a major challenge. In this work, TiC-xFe-(15-x)Ni (x = 0, 5, 10 and 15 wt.%) cermets were fabricated by vacuum liquid-phase sintering to clarify the influence of Fe/Ni binder composition on the microstructure, mechanical properties, electrochemical behavior, and erosion–corrosion resistance in SiO₂-containing artificial seawater. The results indicate that the Fe content has a significant impact on liquid-phase sintering behavior, thereby affecting the densification of cemented carbides. The combination of TiC-5Fe-10Ni achieved the highest relative density (98.89%), Vickers hardness (1618 HV), and fracture toughness (10.26 MPa·m^1/2), while also exhibiting the lowest corrosion current density in electrochemical corrosion tests. In contrast, TiC-10Fe-5Ni cemented carbide showed the lowest cumulative mass loss in long-term erosion–corrosion tests. Conversely, excessive Fe addition leads to suboptimal performance. The performance improvement is mainly attributed to densification and reduced residual porosity achieved through the optimization of liquid-phase sintering, which provides an effective strategy for designing cost-effective TiC-based composites with balanced mechanical properties and long-term corrosion and erosion resistance.