目前,我国的发动机叶片材料多采用添加硼的镍基高温合金。硼在高温合金中的作用是强化晶界,阻碍裂纹的形成与扩展。由于硼的扩散对温度很敏感,因此对热处理及使用过程中可能发生的脱硼现象及脱硼区深度的了解是很重要的。本工作采用α粒子径迹显微照像术观测了硼的分布及热处理不当导致发动机叶片表面的脱硼现象。 At present, China’s engine blade material is more boron-added nickel-based superalloy. The role of boron in superalloys is to strengthen grain boundaries and hinder the formation and propagation of cracks. Due to the temperature sensitivity of boron diffusion, it is important to understand the deboronization and depth of deboronation that may occur during heat treatment and use. In this work, α particle track microscopy was used to observe the distribution of boron and improper heat treatment, which led to the deboronation on the engine blade surface.