目的 解决 60Si2Mn 合金钢在化学氧化时生成的化学氧化膜颜色差异问题。 方法 采用辉光放电光谱(GDS)分析不同氧化温度下制备的 60Si2Mn 化学氧化膜层成分及化学氧化膜的厚度,采用扫描电镜(SEM)观测氧化膜表面形貌,分析合金元素对化学氧化的影响,以及化学氧化温度对化学氧化膜厚度、成分含量及颜色的影响,改进 60Si2Mn 化学氧化工艺。 结果 不同化学氧化温度对 60Si2Mn 化学氧化膜厚度及膜层中合金成分的含量有较大影响。 不同化学氧化温度导致化学氧化膜厚度差异,化学氧化膜中合金成分 Si、Mn 氧化物含量差异导致 60Si2Mn 化学氧化膜颜色的差异。 结论 相对于普通钢,化学氧化温度为 (142±1) ℃时,可以保证化学氧化膜厚度及 Fe3O4 含量的稳定,进而有效确保氧化膜的颜色一致性。

Objective To resolve the color difference problem of oxidizing films that often happens during hot alkaline chemical oxidation production of 60Si2Mn alloy steel. Methods The components and thickness of 60Si2Mn oxidizing films produced at different temperatures were analyzed by glow discharge spectrum GDS, and the surface morphology of oxidizing films was observed by SEM. The effect of alloy elements on chemical oxidation, and the effect of chemical oxidation temperature on the thickness, composition and color of oxidizing films were analyzed on the basis of electrochemistry. Finally, process improvement measures were proposed for chemical oxidation of 60Si2Mn. Results The result showed that different chemical oxidation temperature had large effect on the contents of alloy elements and the thickness of 60Si2Mn oxidizing films. The different chemical oxidation temperature led to different thickness of chemical oxidizing films, while the difference in the contents of alloy components Si and Mn oxide led to color difference in 60Si2Mn oxidizing films. Conclusion As compared to ordinary steel, when the chemical oxidation temperature was (142±1) ℃, the thickness of oxidizing films and the stable content of Fe3O4 could be ensured, which further ensured the color consistency of 60Si2Mn oxidizing films.