Wu Teng, Shi Wenqing, Xie Linyi, Gong Meimei, Huang Jiang, Xie Yuping, He Kuanfang
School of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China.
School of Mechatronic Engineering and Automation, Foshan University, Foshan 528000, China.
Materials (Basel). 2022 Jun 1;15(11):3952. doi: 10.3390/ma15113952.
The effect of 60Si2Mn substrate preheating on the forming quality and mechanical properties of cobalt-based tungsten carbide composite coating was investigated. Substrate preheating was divided into four classes (room temperature, 150 °C, 250 °C, and 350 °C). The morphology, microstructure, and distribution of elements of the coating were analyzed using a two-color laser handheld 3D scanner, a scanning electron microscope (SEM), and an energy dispersive X-ray spectrometer (EDX), respectively. The hardness and wear properties of the cladding layer were characterized through a microhardness tester and a friction wear experiment. The research results show that the substrate preheating temperature is directly proportional to the height of the composite coating. The solidification characteristics of the Stellite 6/WC cladding layer structure are not obviously changed at substrate preheating temperatures of room temperature, 150 °C, and 250 °C. The solidified structure is even more complex at a substrate preheating temperature of 350 °C. At this moment, the microstructure of the cladding layer is mainly various blocky, petaloid, and flower-like precipitates. The hardness and wear properties of the cladding layer are optimal at a substrate preheating temperature of 350 °C in terms of mechanical properties.
研究了60Si2Mn基体预热对钴基碳化钨复合涂层成形质量和力学性能的影响。基体预热分为四类（室温、150℃、250℃和350℃）。分别使用双色激光手持式3D扫描仪、扫描电子显微镜（SEM）和能量色散X射线光谱仪（EDX）分析涂层的形貌、微观结构和元素分布。通过显微硬度计和摩擦磨损实验对熔覆层的硬度和耐磨性能进行表征。研究结果表明，基体预热温度与复合涂层的高度成正比。在室温、150℃和250℃的基体预热温度下，司太立6/碳化钨熔覆层结构的凝固特性没有明显变化。在350℃的基体预热温度下，凝固组织更加复杂。此时，熔覆层的微观结构主要是各种块状、花瓣状和花状析出物。就力学性能而言，在350℃的基体预热温度下，熔覆层的硬度和耐磨性能最佳。
