The CoCrFeNiMo coatings were prepared by laser cladding on 45 steel surface. The microstructure, hardness and wear resistance of CoCrFeNiMo high-entropy alloy were investigated by means of scanning electron microscopy, X-ray diffractometer, hardness tester and wear tester. The effect of laser scanning speed on the microstructure and mechanical properties of the coating was studied. Experimental results show that the coating and matrix combines well, the microstructure of the coatings is mainly composed of equiaxed grains. The phase structure of the coating is mainly composed of face-centered cubic (FCC) structure, body-centered cubic (BCC) structure and Laves phase. There is a slight segregation of Mo element. The CoCrFeNiMo coating has high hardness, the highest surface hardness is 741 HV. Fine-grained strengthening, BCC structure and Laves phase provided a guarantee for the excellent wear resistance of the coating. With the increase of scanning speed, the structure is refined, the hardness is improved and the wear resistance is enhanced.

通过在45钢表面上进行激光熔覆来制备CoCrFeNiMo涂层。通过扫描电子显微镜，X射线衍射仪，硬度计和磨损测试仪对CoCrFeNiMo高熵合金的组织，硬度和耐磨性进行了研究。研究了激光扫描速度对涂层组织和力学性能的影响。实验结果表明，涂​​层与基体结合良好，涂层的微观结构主要由等轴晶组成。涂层的相结构主要由面心立方（FCC）结构，体心立方（BCC）结构和拉夫斯相组成。Mo元素略有偏析。CoCrFeNiMo涂层具有高硬度，最高表面硬度为741 HV。细粒度的强化，BCC结构和Laves相为涂层的出色耐磨性提供了保证。随着扫描速度的提高，结构细化，硬度提高，耐磨性增强。