In the present work, the effect of annealing temperature on the microstructure, mechanical and tribological properties of NiCr–WC–Co coatings produced by the high-velocity oxy-fuel (HVOF) technique has been investigated. X-ray diffraction and scanning electron microscopy revealed the dissolution of WC into the NiCr matrix to form W2C and Cr3C2 with the annealing process. This dissolution became complete at 800 °C. The mechanical properties of the coatings were investigated using nano-indentation and Vickers fracture toughness measurements. These measurements suggested that the hardness, Young's modulus, and fracture toughness values increased because of the newly formed carbide phases as a result of the dissolution of the WC particles. The overall properties of the coatings were found to be optimum for annealing temperatures of 800 °C. The wear mechanism appears to be abrasive in the as-sprayed coating, and it becomes a combination of an abrasive and oxidative wear with increasing the annealing temperature.

在目前的工作中，已经研究了退火温度对通过高速含氧燃料（HVOF）技术生产的NiCr–WC–Co涂层的组织，力学和摩擦学性能的影响。X射线衍射和扫描电子显微镜显示，WC溶解在NiCr基体中，形成W 2 C和Cr 3 C 2。随着退火过程。在800℃下该溶解完成。使用纳米压痕和维氏断裂韧性测量方法研究了涂层的机械性能。这些测量结果表明，由于WC颗粒的溶解，新形成的碳化物相增加了硬度，杨氏模量和断裂韧性值。发现该涂层的整体性能对于800℃的退火温度是最佳的。磨损机理在喷涂后的涂层中似乎是磨料，随着退火温度的升高，它变成磨料和氧化磨损的组合。