采用激光熔覆技术制备了碳纤维增强316L不锈钢,研究了扫描速度对碳纤维增强316L不锈钢显微结构、显微硬度和耐磨性的影响。结果表明:激光熔覆316L不锈钢由γ-Fe相组成,而激光熔覆碳纤维增强316L不锈钢主要由M23C6、γ-Fe和α-Fe组成,其中M23C6均匀地分布在γ-Fe和α-Fe树枝晶间;随着扫描速度增大,枝晶臂间距减小,显微硬度先增加后减小,耐磨性先增强后降低;当扫描速度为12 mm/s时,激光熔覆碳纤维增强316L不锈钢的耐磨性最好,相对于未加碳纤维的激光熔覆316L不锈钢提高了约25.3%。

Carbon fibers (CFs) reinforced 316L stainless steels are prepared using laser cladding (LC) and the effects of scanning speed on the microstructure, microhardness, and wear resistance of carbon fibers reinforced 316L stainless steel are investigated in this study. Results show that the laser cladded 316L stainless steel without carbon fibers is composed of γ-Fe phase, the phases of the laser cladding carbon fibers reinforced 316L stainless are mainly composed of M₂₃C₆, γ-Fe and α-Fe, and M₂₃C₆ homogeneously distributes between γ-Fe and α-Fe dendrites. As the scanning speed increases, the distance between the dendrite arms decreases, while the microhardness first increases and then decreases. As a result, the wear resistance first enhances and then decreases. When the scanning speed is 12 mm/s, the laser cladding carbon fibers reinforced 316L stainless steel exhibits the highest wear resistance, and its wear resistance increases by approximately 25.3% compared with that of the laser cladded 316L stainless steel without carbon fibers.