Cr_3C_2-25NiCr对铁基激光熔覆层微观组织与性能的影响

利用同步送粉的激光熔覆技术,以铁基激光熔覆粉和Cr3C2-25NiCr为原料在中碳钢基材上制备耐磨熔覆层。通过扫描电镜（SEM）、能谱（EDS）、X射线衍射（XRD）、显微硬度计等分析检测手段和冲蚀试验,研究了Cr3C2-25NiCr颗粒尺寸对熔覆层组织结构、硬度、耐冲蚀磨损性能的影响。结果表明：添加小颗粒Cr3C2-25NiCr后熔覆层的显微硬度约提高25%,冲蚀失重降低约50%;添加大颗粒Cr3C2-25NiCr后熔覆层的显微硬度约提高50%,冲蚀失重降低约60%。

The Effects of Cr3C2-25NiCr on Microstructure and Properties of Ironbased Laser Clad Layer

Using the synchronous powder feeding laser cladding technology,a wear resistant cladding layer is prepared in medium carbon steel substrate with iron based laser cladding powder and Cr₃C₂-25NiCr as raw materials. Through scanning electron microscopy（SEM）, spectroscopy（EDS）, X-ray diffraction（XRD）, micro-hardness testing methods such as analysis and erosion, study the effect of Cr₃C₂-25NiCr on the cladding layer organization structure, hardness, resistance to abrasion performance. The results show that after adding small particles of Cr3C2-25NiCr,the hardness of the cladding layer is improved by about 25%,erosion of weightlessness is reduced about 50%;after adding large particle size of Cr₃C₂-25NiCr,the hardness of the cladding layer is improved by about 50%, erosion of weightlessness is reduced about 60%.