摘要
热轧碳钢BRC3表面氧化皮由最外Fe2O3层、中间Fe3O4层及最内FeO层组成,Fe3O4层与FeO层的厚度比约1∶3。在氧化皮的加热过程中,加热温度低于500℃,氧化皮的成分及结构保持不变;加热温度升高至600℃,FeO层内有大量Fe3O4析出;加热温度为700℃,氧化皮中只存在单一的FeO层。在氢还原过程中,还原温度为400℃时,仅有表层很小一部分氧化皮被还原,当还原温度为500℃时,氧化皮完全被还原为金属铁;但当还原温度升高至600及700℃时,还原效果反而略有下降。
Oxide scale formed on BRC3 carbon steel consists of outer Fe2O3 layer, intermediate Fe3O4 layer and inner FeO layer. Ratio of thickness of Fe3O4 layer and FeO layer is about 1： 3. Before hydrogen reduction, when temperature is below 500℃, the composition and structure of oxide scale remain unchanged. When temperature is up to 600℃, a large amount of Fe3O4 precipitates within original FeO layer. When temperature is 700℃, all oxides is transformed into FeO completely. During hydrogen reduction, only a little amount of oxide scale is reduced when temperature is 400℃. While temperature reaches 500℃, oxide scale is completely reduced by hydrogen gas. But the effect of increasing temperature on hydrogen gas reduction becomes less when temperature rises from 600 to 700℃.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2008年第4期166-169,共4页
Transactions of Materials and Heat Treatment
关键词
温度
氢气还原
热轧碳钢
氧化皮
temperature
hydrogen gas reduction
hot-rolled carbon steel
oxide scale
