目的 探究全氢罩式退火条件下，冷轧带钢表面氧化色的形成原因及影响因素，为优化全氢罩式退火工艺和消除实际生产中带钢的表面氧化色提供理论基础和实践指导。方法 使用全氢罩式退火炉研究了试验钢成分和退火温度对其表面氧化色的影响。使用X射线光电子能谱仪(XPS)，并结合扫描电子显微镜(SEM)和能量分散谱仪(EDS)，对试验钢表面氧化色的成分和微观形貌进行了表征。结果 退火后产生氧化色的试验钢表面附着有大量直径为100~300 nm的颗粒状氧化物，其组成主要为Mn2O3、MnO、SiO2/SiOx等。这些颗粒状氧化物使试验钢表面在宏观下呈浅蓝色。随退火温度从570 ℃升高到585 ℃，36Mn和50Mn钢产生氧化色钢卷的比例分别从1.69%和21.9%上升至6.27%和53.1%;17Mn和25Mn钢在570 ℃至585 ℃之间退火，不产生氧化色，当退火温度提高到660 ℃时，全部产生氧化色。结论 带钢产生表面氧化色的主要原因是，在退火过程中，发生了合金元素的表面富集和选择性氧化。在退火过程中，没有发生Fe的氧化。退火温度和Mn含量对氧化色的产生有显著影响，退火温度和Mn含量越高，越易产生表面氧化色。

The work aims to research the reasons and influencing factors of oxidized color on the surface of cold-rolled strip under full-hydrogen bell-type annealing, which could provide theoretical basis and practical guidance for optimizing the full-hydrogen bell-type annealing process and reducing the surface oxidation color of strip steel in actual production. The effect of the experimental steel composition and annealing temperature on its surface oxidation color was studied through a full-hydrogen bell-type annealing furnace. X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were used to characterize the composition and micro-morphology of oxidized color on the surface of the experimental steels. After annealing, there were a large number of oxide particles with a diameter of about 100~300 nm attaching to the surface of the experimental steels with oxidized color. And the particles were mainly composed of Mn2O3, MnO and SiO2/SiOx, etc. These particles made the surface of the experimental steels appear light blue from the macroscopic view. As the annealing temperature increased from 570 ℃ to 585 ℃, the proportion of 36Mn and 50Mn steel coils that produce oxidized color increased from 1.69% and 21.9% to 6.27% and 53.1% respectively. 17Mn and 25Mn steel coils did not produce oxidation color when annealing between 570 ℃ and 585 ℃. And when the annealing temperature was increased to 660 ℃, all steel coils produced oxidation color. The main reason for oxidized color production is the surface segregation and selective oxidation of alloy elements during the annealing process of the strip steel. The Fe element is not oxidized during the annealing process. Annealing temperature and the content of Mn have a significant effect on the production of oxidized color. The higher the annealing temperature and the content of Mn are, the more likely the experimental steels will produce oxidized color.