Localised-in-the-edge oxidation of four AISI 430 alloys was investigated after an industrial bright annealing process. The oxidised surface of each specimen was characterised by X-ray photoelectron spectroscopy (XPS), Raman-spectroscopy and SEM. The results showed that the selective oxidation of Cr and Mn took place at the coil edges of AISI 430. This led to the formation of an oxide scale based on Cr₂O₃ and MnCr₂O₄. On the other hand, the formation of Cr(OH)₃ and MnOOH in the outer part of the oxide scale was related to the effect of the H₂–N₂ environment on the annealing furnace. The results concluded that the composition of Cr and Mn in the alloy determined the composition of the oxidation products. However, the effect of annealing time was minor in this oxidation mechanism, which slightly contributed to an increase in the cation diffusion from the steel to the oxide. Finally, the results obtained indicate that the colouration of the coil edges displayed in each studied material varies according to the alloy chemical composition and annealing time.

中文翻译：

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可控H2气氛下AISI 430不锈钢制造过程中的高温氧化现象的特征

经过工业光亮退火工艺后，研究了四种AISI 430合金的边缘局部氧化。通过X射线光电子能谱（XPS），拉曼光谱和SEM来表征每个样品的氧化表面。结果表明，Cr和Mn的选择性氧化发生在AISI 430的线圈边缘。这导致形成基于Cr ₂ O ₃和MnCr ₂ O ₄的氧化皮。另一方面，在氧化皮的外部形成Cr（OH）₃和MnOOH与H ₂ -N ₂的作用有关。退火炉上的环境。结果表明，合金中Cr和Mn的组成决定了氧化产物的组成。但是，在这种氧化机理中，退火时间的影响很小，这稍微增加了阳离子从钢到氧化物的扩散。最后，获得的结果表明，每种研究材料中显示的线圈边缘的着色会根据合金化学成分和退火时间而变化。