采用激光熔覆的方法在45#钢基体上制备了表面形貌良好的FeCrNiCoMn高熵合金涂层，为了研究该高熵合金涂层的抗高温软化性能，分别在550 ℃、700 ℃、900 ℃、1000 ℃、1160 ℃下对涂层进行了2 h的退火实验。用扫描电镜（SEM）、X射线衍射仪（XRD）和显微硬度计分别研究了涂层退火前后的微观形貌、相结构及显微硬度的变化。结果表明，熔覆态涂层组织为柱状树枝晶结构，主要由面心立方固溶体（FCC）和少量体心立方固溶体（BCC）构成，其平均显微硬度为540HV0.2。550 ℃、700 ℃、900 ℃退火后涂层的组织长大不明显，900 ℃退火后涂层BCC固溶体相衍射峰变得非常明显，1000 ℃和1160 ℃退火后组织逐渐长大，相转变为单一的FCC结构。合金涂层经过不同温度退火后，显微硬度呈现先增大后减小的趋势，在900 ℃退火后，涂层硬度最高为665HV0.2，说明该合金涂层在低于900 ℃时具有良好的抗高温软化性能。

The FeCrNiCoMn high-entropy alloy coating with nice surface topography is prepared on 45# steel by laser cladding. In order to study the property of resistance to high temperature softening of the coating, the annealing experiments of coating are performed at 550 ℃, 700 ℃, 900 ℃, 1000 ℃, 1160 ℃ for 2 h, respectively. The microstructure, phase structure and microhardness of the coatings annealed at different temperatures are investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and microhardness tester, respectively. The results show that the coating after laser cladding is mainly composed of typical dendrites and exhibits simple face-centered cubic (FCC) and minor body-centered cubic (BCC) structure phases with average microhardness of 540HV0.2. The microstructure of the coating grows up slightly after being annealed at 550 ℃, 700 ℃ and 900 ℃. However, the coating forms relatively more BCC phase when anneals at 900 ℃. While at 1000 ℃ and 1160 ℃, the microstructure grows up gradually, and the phase structure transforms into single FCC structure. As the annealing temperature increases, the microhardness of the FeCrNiCoMn cladded coating increases firstly, and then decreases, the highest microhardness is 665HV0.2 after being annealed at 900 ℃. It indicates that the FeCrNiCoMn high-entropy coating after laser cladding exhibits nice tempering resistance below 900 ℃.