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采用连续高功率半导体激光器在45#钢表面熔覆制备了Ni-B型石英纤维复合涂层,通过光学显微镜(OM)、扫描电镜(SEM)及能谱仪(EDS)对涂层显微组织、成分进行了研究。结果表明,涂层与基体结合良好,呈冶金结合;涂层内中间偏上位置有少量黑色泡状物,直径为10~20mm,V槽底部存在由B型石英纤维溶解而形成的凹槽,且与周围Ni基及基体产生原子分子间扩散;硬度测试表明,涂层硬度呈阶梯状分布,最高达445HV0.3,为基体的3.25倍。
Ni-B type quartz fiber composite coating was prepared by cladding the 45 # steel with continuous high power semiconductor laser. The microstructure of the coating was characterized by optical microscope (OM), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) The ingredients were studied. The results show that the coating is well bonded with the substrate and is metallurgically bonded. There is a small amount of black bubbles in the middle of the coating with a diameter of 10 ~ 20mm. There is a groove formed by the dissolution of type B quartz fiber at the bottom of the V- And with the surrounding Ni base and matrix atoms between the atomic diffusion; hardness test showed that the hardness of the coating was ladder-like distribution, up to 445HV0.3, 3.25 times that of the matrix.