The effect of microstructure on fretting wear behavior of Inconel 625 alloy was studied after different thermal deformation conditions (strain rate and temperature). The results show that grain size and microhardness have a significant influence on the fretting wear. As thermal deformation temperature increases and strain rate decreases, grain size increases and microhardness decreases. The oxide formed on the surface of Inconel 625 helps to reduce wear, but oxidative wear is the main wear mechanism. In the thermal deformation temperature range of 900–1000 °C and strain rate of 0.1–1 s⁻¹, grain size is less than 4.5 μm, and the hardness is greater than 252.9 HV. Under these conditions, the coefficient of friction is the highest and the wear volume is the lowest. This paper proposes to improve the fretting wear resistance of the workpiece by adjusting the strain rate and temperature during the thermal deformation process.

在不同的热变形条件（应变速率和温度）下，研究了显微组织对Inconel 625合金微动磨损行为的影响。结果表明，晶粒尺寸和显微硬度对微动磨损有重要影响。随着热变形温度的升高和应变率的降低，晶粒尺寸增加，显微硬度降低。Inconel 625表面上形成的氧化物有助于减少磨损，但氧化磨损是主要的磨损机理。在900–1000°C的热变形温度范围和0.1–1 s ^-1的应变速率下，晶粒尺寸小于4.5μm，硬度大于252.9 HV。在这些条件下，摩擦系数最高，磨损量最低。本文提出了通过调节热变形过程中的应变率和温度来提高工件的微动磨损性能。