Coatings on the surface of nodular cast iron were prepared using a continuous wave semiconductor laser as a function of laser power. The cross-sections were etched by aqua regia to reveal the microstructure, and then the surfaces were examined by optical microscopy (OM) and scanning electron microscopy (SEM). The phase composition was analyzed by X-ray diffraction (XRD), and the hardness was measured using a Vickers hardness tester. The wear behaviors were examined using a microscopic wear test machine. The results revealed that the microstructure of the coatings was mainly composed of martensite and austenite. As the laser power increased, a wider columnar dendrite zone and an equiaxed dendrite zone can be observed, and the proportion of martensite decreased and retained austenite increased. The hardness first increased and then decreased with the increasing laser power. Solidification cracking was detected at higher laser power. All the worn surfaces at different laser powers exhibited typical adhesive wear, and the coatings with more martensite had better wear resistance.

使用连续波半导体激光器作为激光功率的函数来制备球墨铸铁表面的涂层。用王水蚀刻横截面以揭示其微观结构，然后通过光学显微镜（OM）和扫描电子显微镜（SEM）检查表面。通过X射线衍射（XRD）分析相组成，并使用维氏硬度计测量硬度。使用显微磨损测试机检查磨损行为。结果表明，涂​​层的显微组织主要由马氏体和奥氏体组成。随着激光功率的增加，可以观察到较宽的柱状枝晶区和等轴枝晶区，并且马氏体的比例减少，残留奥氏体增加。随着激光功率的增加，硬度先增加然后降低。在较高的激光功率下检测到固化裂纹。在不同激光功率下的所有磨损表面均表现出典型的粘合剂磨损，马氏体含量更高的涂​​层具有更好的耐磨性。